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how to cite sources in essay apa

In-Text Citations: The Basics

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Note:  This page reflects the latest version of the APA Publication Manual (i.e., APA 7), which released in October 2019. The equivalent resource for the older APA 6 style  can be found here .

Reference citations in text are covered on pages 261-268 of the Publication Manual. What follows are some general guidelines for referring to the works of others in your essay.

Note:  On pages 117-118, the Publication Manual suggests that authors of research papers should use the past tense or present perfect tense for signal phrases that occur in the literature review and procedure descriptions (for example, Jones (1998)  found  or Jones (1998)  has found ...). Contexts other than traditionally-structured research writing may permit the simple present tense (for example, Jones (1998)  finds ).

APA Citation Basics

When using APA format, follow the author-date method of in-text citation. This means that the author's last name and the year of publication for the source should appear in the text, like, for example, (Jones, 1998). One complete reference for each source should appear in the reference list at the end of the paper.

If you are referring to an idea from another work but  NOT  directly quoting the material, or making reference to an entire book, article or other work, you only have to make reference to the author and year of publication and not the page number in your in-text reference.

On the other hand, if you are directly quoting or borrowing from another work, you should include the page number at the end of the parenthetical citation. Use the abbreviation “p.” (for one page) or “pp.” (for multiple pages) before listing the page number(s). Use an en dash for page ranges. For example, you might write (Jones, 1998, p. 199) or (Jones, 1998, pp. 199–201). This information is reiterated below.

Regardless of how they are referenced, all sources that are cited in the text must appear in the reference list at the end of the paper.

In-text citation capitalization, quotes, and italics/underlining

( Note:  in your References list, only the first word of a title will be capitalized:  Writing new media .)

Short quotations

If you are directly quoting from a work, you will need to include the author, year of publication, and page number for the reference (preceded by "p." for a single page and “pp.” for a span of multiple pages, with the page numbers separated by an en dash).

You can introduce the quotation with a signal phrase that includes the author's last name followed by the date of publication in parentheses.

If you do not include the author’s name in the text of the sentence, place the author's last name, the year of publication, and the page number in parentheses after the quotation.

Long quotations

Place direct quotations that are 40 words or longer in a free-standing block of typewritten lines and omit quotation marks. Start the quotation on a new line, indented 1/2 inch from the left margin, i.e., in the same place you would begin a new paragraph. Type the entire quotation on the new margin, and indent the first line of any subsequent paragraph within the quotation 1/2 inch from the new margin. Maintain double-spacing throughout, but do not add an extra blank line before or after it. The parenthetical citation should come after the closing punctuation mark.

Because block quotation formatting is difficult for us to replicate in the OWL's content management system, we have simply provided a screenshot of a generic example below.

This image shows how to format a long quotation in an APA seventh edition paper.

Formatting example for block quotations in APA 7 style.

Quotations from sources without pages

Direct quotations from sources that do not contain pages should not reference a page number. Instead, you may reference another logical identifying element: a paragraph, a chapter number, a section number, a table number, or something else. Older works (like religious texts) can also incorporate special location identifiers like verse numbers. In short: pick a substitute for page numbers that makes sense for your source.

Summary or paraphrase

If you are paraphrasing an idea from another work, you only have to make reference to the author and year of publication in your in-text reference and may omit the page numbers. APA guidelines, however, do encourage including a page range for a summary or paraphrase when it will help the reader find the information in a longer work. 

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Apa quick citation guide.

Using In-text Citation

Include an in-text citation when you refer to, summarize, paraphrase, or quote from another source. For every in-text citation in your paper, there must be a corresponding entry in your reference list.

APA in-text citation style uses the author's last name and the year of publication, for example: (Field, 2005). For direct quotations, include the page number as well, for example: (Field, 2005, p. 14). For sources such as websites and e-books that have no page numbers , use a paragraph number, for example: (Field, 2005, para. 1). More information on direct quotation of sources without pagination is given on the APA Style and Grammar Guidelines web page.

Example paragraph with in-text citation

A few researchers in the linguistics field have developed training programs designed to improve native speakers' ability to understand accented speech (Derwing et al., 2002; Thomas, 2004). Their training techniques are based on the research described above indicating that comprehension improves with exposure to non-native speech.   Derwing et al. (2002) conducted their training with students preparing to be social workers, but note that other professionals who work with non-native speakers could benefit from a similar program.

Derwing, T. M., Rossiter, M. J., & Munro, M. J. (2002). Teaching native speakers to listen to foreign-accented speech.  Journal of Multilingual and Multicultural Development , 23 (4), 245-259.

Thomas, H. K. (2004).  Training strategies for improving listeners' comprehension of foreign-accented speech  (Doctoral dissertation). University of Colorado, Boulder.

Citing Web Pages In Text

Cite web pages in text as you would any other source, using the author and date if known. Keep in mind that the author may be an organization rather than a person. For sources with no author, use the title in place of an author.

For sources with no date use n.d. (for no date) in place of the year: (Smith, n.d.). For more information on citations for sources with no date or other missing information see the page on missing reference information on the APA Style and Grammar Guidelines web page. 

Below are examples of using in-text citation with web pages.

Web page with author:

In-text citation

Heavy social media use can be linked to depression and other mental disorders in teens (Asmelash, 2019).

Reference entry

Asmelash, L. (2019, August 14). Social media use may harm teens' mental health by disrupting positive activities, study says . CNN. https://www.cnn.com/2019/08/13/health/social-media-mental-health-trnd/index.html

Web page with organizational author:

More than 300 million people worldwide are affected by depression (World Health Organization, 2018).

World Health Organization. (2018, March 22).  Depression . https://www.who.int/en/news-room/fact-sheets/detail/depression

Web page with no date:

Establishing regular routines, such as exercise, can help survivors of disasters recover from trauma (American Psychological Association [APA], n.d.).

American Psychological Association. (n.d.). Recovering emotionally from disaste r. http://www.apa.org/helpcenter/recovering-disasters.aspx

General Guidelines

In-text references should immediately follow the title, word, or phrase to which they are directly relevant, rather than appearing at the end of long clauses or sentences. In-text references should always precede punctuation marks. Below are examples of using in-text citation.

Author's name in parentheses:

One study found that the most important element in comprehending non-native speech is familiarity with the topic (Gass & Varonis, 1984).

Author's name part of narrative:

Gass and Varonis (1984) found that the most important element in comprehending non-native speech is familiarity with the topic.

Group as author: First citation: (American Psychological Association [APA], 2015) Subsequent citation: (APA, 2015)

Multiple works: (separate each work with semi-colons)

Research shows that listening to a particular accent improves comprehension of accented speech in general (Gass & Varonis, 1984; Krech Thomas, 2004).

Direct quote: (include page number and place quotation marks around the direct quote)

One study found that “the listener's familiarity with the topic of discourse greatly facilitates the interpretation of the entire message” (Gass & Varonis, 1984, p. 85).

Gass and Varonis (1984) found that “the listener’s familiarity with the topic of discourse greatly facilitates the interpretation of the entire message” (p. 85).

Note:  For direct quotations of more than 40 words , display the quote as an indented block of text without quotation marks and include the authors’ names, year, and page number in parentheses at the end of the quote. For example:

This suggests that familiarity with nonnative speech in general, although it is clearly not as important a variable as topic familiarity, may indeed have some effect. That is, prior experience with nonnative speech, such as that gained by listening to the reading, facilitates comprehension. (Gass & Varonis, 1984, p. 77)

Works by Multiple Authors

APA style has specific rules for citing works by multiple authors. Use the following guidelines to determine how to correctly cite works by multiple authors in text. For more information on citing works by multiple authors see the APA Style and Grammar Guidelines page on in-text citation .

Note: When using multiple authors' names as part of your narrative, rather than in parentheses, always spell out the word and. For multiple authors' names within a parenthetic citation, use &.

One author: (Field, 2005)

Two authors: (Gass & Varonis, 1984)

Three or more authors:   (Tremblay et al., 2010)

APA Citation Guide

how to cite sources in essay apa

APA (American Psychological Association) style is used to cite sources in the field of social sciences. It can be used for research papers in the subjects of social anthropology, sociology, social psychology, political science, and economics.

In this guide, our law essay writing services team will provide you with specific directions on how to organize and properly cite different types of sources in APA format — along with citation examples. This article is a good aid for anyone who wishes to live up to high academic standards, avoid plagiarism, and cite their sources in accordance with the latest APA style rules.

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The following guide is based on the most recent 6th edition of the Publication Manual of the American Psychological association.

APA Referencing Basics: Reference List

A reference list is a list of all the sources one has used in their essay. Everything in other citation styles, such as the bibliography or works cited page, are simply called a reference list in the APA format. In order to make it easier for a reader to navigate your essay and look for cited sources, there are specific rules to follow to organize it:

how to cite sources in essay apa

APA Referencing Basics: In-Text Citation

Example: (Smith & Jones, 2002)

If you choose to use a signal phrase, you should use “and”, and only put the year of publication in parentheses:

Example: According to Smith and Jones (2002), the circumstances of…
Example: (Brooks, Jones, Smith, & Orozco, 2009)

In any follow-up citations throughout the text, instead of listing all of the authors, you should simply include the first name followed by “et al.” and the year:

Example: (Brooks et al., 2009)
Examples: Brooks et al. (2009) suggested… (Brooks et al., 2009)
Example: The research was conducted in a suitable environment (“Deduction Methods”, 1996)
Examples: Findings of this research were outstanding (Brooks, 1972a)… The finding of Brooks’ research (1972a)…
Example: (Brooks, 1995; Gandhi, 2004)
Examples: The laws followed by Internal Revenue Service (2002)… The laws followed by this organization (IRS, 2002)…
Example: Brooks suggested that…(as cited in Smith, 2002, p.459)

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How to Cite Different Source Types

In this section you will discover how to cite different printed and digital sources.

How to Cite a Book in APA Format

Author, A. A. (Year of publication). Title of work: Capital letters also for subtitles. Location: Publisher.

First, put the last name of the author, followed by a comma, then initial(s). In parentheses, put the year of publication. Next, the title of the book. Italicize the title — although the only capitalized letters are the first letters of the title and subtitle. Then, you should include the location of where the book was published, along with the publisher, separated by a semicolon:

Citation example: Smith, A. J. (2009). Economic in modern life: Guide to success. New York City; Manhattan press.
Citation example: Salinger, J. J. (1897). Glass Family [Kindle DX version]. Retrieved from Amazon.com
Citation example: De Puff, E. W. (n.d.). Indian Lifestyle: Traditions and myths. Retrieved from https://digital.library.sdsu.edu/indians.html

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How to Cite a Journal Article in APA Format

Citation example: Scraton, J. (1993). The eclipse of understanding. The New Yorker Style, 21(4) , 5-13.

A DOI, or Digital Object Identifier, is a tool used in the APA format, instead of a URL. URLs tend to change; therefore, the reader is not always able to retrieve a certain online source. DOIs, on the other hand, have a long-lasting link that is unique to a specific article. If a DOI is unavailable, the use of a URL is permitted.

Author, A. A., & Author, B. B. (Date of publication). Title of article. Title of Journal, volume number (issue number, if available), page range. doi:0000000/000000000000 or https://doi.org/10.0000/0000

Citation example: Brownie, D. (2007). French economics: An annotated bibliography. European Journal of Marketing, 41 , 1245-1283. doi:10.1108/03090560710821161

We also advise you to read about what is a definition essay .

How to Reference a Newspaper in APA Format

Citation example: Curtis, S. (2005, October 22). Fields grown to thrive. The Country Today , pp. 1A, 2A.

Author, A. A. (Year, Month Day). Title of article. Title of Newspaper . Retrieved from https://www.homeaddress.com/

Example: Galveston, T. (2008, August 6). Psychology newsletter. The New York Times . Retrieved from https://well.blogs.nytimes.com/

How to Reference a Magazine in APA Format

Citation example: Henry, W. A., (1990, April). Making the grade in today's schools. Time , 135, 28-31.

Author, A. A., & Author, B. B. (Date of publication). Title of article. Title of Magazine, issue number , page range. doi:0000000/000000000000 or https://doi.org/10.0000/0000

Citation example: Henry, W. A., (1990, April). Making the grade in today's schools. Time, 135 , 28-31. doi: 10.1108/03090560710821161

How to Cite a Movie/Film in APA Format

Producer, P. P. (Producer), & Director, D. D. (Director). (Date of publication). Title of motion picture [Motion picture]. Country of origin: Studio or distributor.

Citation example: Carroll, G., Giler, D., & Hill, W. (Producers), & Scott, R. (Director). (1979). Alien [Motion Picture]. United States: Twentieth Century Fox.

Last Name, F.M. [Username]. (Year, Month Date). Title of video [Video File]. Retrieved from URL

Citation example: Apolon, M. [marsolon]. (2011, October 9). The tape 14 [Video file]. Retrieved from https://www.youtube.com/watch?v=6nyGC848/

How to Cite a TV/Radio Broadcast in APA Format

Writer, W. W. (Writer), & Director, D. D. (Director). (Date of publication). Title of episode [Television series episode]. In P. Producer (Producer), Series title . City, state of origin: Studio or distributor.

Citation example: Dick, L. (Writer), & Yaitanes, G. (Director). (2009). Simple explanation [Television series episode]. In P. Attanasio (Executive producer), House, M.D. . Los Angeles, CA: Fox Broadcasting..

How to Cite a Website in APA Format

Author, A. A. & Author B. B. (Date of publication). Title of page [Format description when necessary]. Retrieved from https://www.someaddress.com/full/url/

Citation example: Eco, U. (2015). How to write a thesis [PDF file]. (Farina C. M. & Farina F., Trans.) Retrieved from https://www.researchgate.net/How_to_write_a_thesis/.../Umberto+Eco-How+to+Write/
Citation example: Spotlight Resources. (n.d.). Retrieved from https://www.researchgate.net/about/information/spotlight_resources.html/

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APA In-Text Citations and Sample Essay 7th Edition

This handout focuses on how to format in-text citations in APA.

Proper citation of sources is a two-part process . You must first cite each source in the body of your essay; these citations within the essay are called in-text citations . You MUST cite all quoted, paraphrased, or summarized words, ideas, and facts from sources. Without in-text citations, you are technically in danger of plagiarism, even if you have listed your sources at the end of the essay.

In-text citations point the reader to the sources’ information on the references page. The in-text citation typically includes the author's last name and the year of publication. If you use a direct quote, the page number is also provided.

More information can be found on p. 253 of the 7th edition of the Publication Manual of the American Psychological Association.

Citation Rules

Direct quotation with the author named in the text.

Heinze and Lu (2017) stated, “The NFL shifted its responses to institutional change around concussions significantly as the field itself evolved” (p. 509).

Note: The year of publication is listed in parenthesis after the names of the authors, and the page number is listed in parenthesis at the end of the quote.

Direct Quotation without the Author Named in the Text

As the NFL developed as an organization, it “shifted its responses to institutional change around concussions significantly” (Heinze & Lu, 2017, p. 509).

Note: At the end of the quote, the names of the authors, year of publication, and page number are listed in parenthesis.

Paraphrase with 1-2 Authors

As the NFL developed as an organization, its reactions toward concussions also transformed (Heinze & Lu, 2017).

Note: For paraphrases, page numbers are encouraged but not required.

Paraphrase with 3 or More Authors

To work toward solving the issue of violence in prisons begins with determining aspects that might connect with prisoners' violent conduct (Thomson et al., 2019).

Direct Quotation without an Author

The findings were astonishing "in a recent study of parent and adult child relationships" ("Parents and Their Children," 2007, p. 2).

Note: Since the author of the text is not stated, a shortened version of the title is used instead.

Secondary Sources

When using secondary sources, use the phrase "as cited in" and cite the secondary source on the References page.

In 1936, Keynes said, “governments should run deficits when the economy is slow to avoid unemployment” (as cited in Richardson, 2008, p. 257).

Long (Block) Quotations

When using direct quotations of 40 or more words, indent five spaces from the left margin without using quotation marks. The final period should come before the parenthetical citation.

At Meramec, an English department policy states:

To honor and protect their own work and that of others, all students must give credit to proprietary sources that are used for course work. It is assumed that any information that is not documented is either common knowledge in that field or the original work of that student. (St. Louis Community College, 2001, p. 1)

Website Citations

If citing a specific web document without a page number, include the name of the author, date, title of the section, and paragraph number in parentheses:

In America, “Two out of five deaths among U.S. teens are the result of a motor vehicle crash” (National Center for Injury Prevention and Control, 2004, Overview section, para. 1).

Here is a print-friendly version of this content.

Learn more about the APA References page by reviewing this handout .

For information on STLCC's academic integrity policy, check out this webpage .

For additional information on APA, check out STLCC's LibGuide on APA .

Sample Essay

A sample APA essay is available at this link .

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APA Citation Guide (7th Edition): In-Text Citation

In-Text Citation

What Is In-Text Citation?

In APA, in-text citations are inserted in the text of your research paper to briefly document the source of your information. Brief in-text citations point the reader to more complete information in the Reference list.

When using APA format, follow the author-date method of in-text citation. In the author-date method, the writer includes the author and date within the body of the paper and includes a corresponding reference in the Reference list. This method allows the reader to identify sources used in the paper by reviewing the author and date within the text of the paper, and then easily locate the corresponding reference in the alphabetical Reference list.

Create an in-text citation whenever you quote another work, or whenever you paraphrase another work in your own words.

In-text Citations Have Two Formats

If you are referring to an idea from another work (paraphrasing or summarizing) but NOT directly quoting the material, you only have to make reference to the author and year of publication and not the page number in your in-text reference.

If you are directly quoting or borrowing from another work, you should include the page number at the end of the parenthetical citation. For example, (Burnside, 2016, p. 199).

In-Text Citation Styles

The table below shows several examples of parenthetical and narrative citations.

Paraphrasing and Quoting: What Is the Difference?

There are two ways to integrate sources into your assignment:

Signal Phrases

If you refer to the author's name in a sentence, you do not have to include the name again as part of your in-text citation; instead, include the date after the name and the page number (if there is one) at the end of the quotation or the paraphrased section. For example:

Hunt (2011) explains that mother-infant attachment has been a leading topic of developmental research since John Bowlby found that "children raised in institutions were deficient in emotional and personality development" (p. 358).

Short Quotations

If a quotation consists of fewer than 40 words , treat it as a short quotation:

Long (Block) Quotations

If a quotation contains 40 words or more , treat it as a long (block) quotation:

Direct Quotation Without Page Numbers

When you quote from electronic sources that do not provide page numbers (e.g., webpages, websites, some e-books), provide readers with another way of locating the quoted passage. Use any of the following approaches that will best help readers find the quotation:

In-Text Citation for More than One Source

If you would like to cite more than one source within the same in-text citation, simply record the in-text citations as normal and separate them with a semi-colon. List the sources alphabetically by author's last name or first word used from the title if no author is given, in the same order they would appear in the Reference list. For example:

(Jones, 2015; Smith, 2014). 

( Beckworth, 2016;  "Nursing,"  2015).

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APA Citation Style Guide (6th Ed.): Overview

7th Edition

For information on the 7th edition of APA, visit the new guide at  USC'sThomas Cooper Library:

7th Edition Guide

About APA Style

American Psychological Association (APA) style is commonly used for citing references in science and social science courses, such as Nursing, Psychology, Education, and Social Work.  This guide is based on the 6th edition published in 2010.

This edition is shelved in the Ready Reference area behind the Library's Circulation Desk and may be used in the library (it can't be checked out). 

The call number is READY REF WZ 345 P976 2010

how to cite sources in essay apa

New Content in the 6th Edition

Some of the changes in the new edition include:

To learn more about the changes made in the new edition, check out the " What's New " section on the official APA Website.

You may also want to check out the APA blog  to learn more about such topics as using DOIs and citing specific sources.

Attributions

Portions of this LibGuide have been copied, with permission, from the following institutions:

General Guidelines

Numbers in parentheses refer to specific pages in the APA 6th Edition manual.

Author-Date Citation System in Text (p. 174)

In Text: 

The conquest of pellagra is commonly associated with a single name: Joseph Goldberger (Bryan, 2014).

This entry in Reference list: 

Bryan, C.S. (2014).  Asylum Doctor: James Woods Babcock and the Red Plague of Pellagra.   Columbia, SC: The University of South Carolina Press.

Double-space your entire paper, including the References list and any block quotes (pp. 229, 171, 180)

Recommended Typeface:  The preferred APA typeface , or font , is 12-point Times New Roman.  (p. 228)

Page Numbers and Running Head (p. 230)

Tip: Use the "header" function on your word processor to set up the page numbers and running head. Since the running head format is different on the title page than the subsequent pages, you will need to choose "different first page" within your word processor header function.

Learn more about APA Style

About Plagiarism

Give credit to all sources from which you have taken information, whether you have directly quoted, paraphrased, or summarized the author’s words.   Failing to document your sources constitutes plagiarism.  

See page 170 of the manual for more information about plagiarism.

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Citing Sources Guide

Quoting vs. Paraphrasing

Quoting is when you use the author's exact words. Use quotation marks (" ") to denote a direct quote.

Paraphrasing is when you use the author's idea, but put it in your own words. You do not need to use quotation marks when paraphrasing.

Both quoting and paraphrasing require a citation.

Websites for Citation

   • Purdue OWL - APA  -  A great site with tons of examples

   • Excelsior Online Writing Lab  -  Lots of examples, checklists, and activities to practice citing

Intro to APA

APA Style is the official style of the American Psychological Association . It is used for writing and formatting research papers. Some subjects that use APA Style are: Nursing, Psychology, Sociology, Occupational Therapy and Respiratory Therapy, and also Life Science-related: Biology, Environmental Science, Physiology . Check with your instructor to find out which style you should use for your research paper.

Paper Formatting

APA Style will guide how your paper should look and how to cite all of the resources you used. When setting up your document, make sure you follow these guidelines:

Make sure your paper is formatted correctly using this APA Format Checklist

In-text Citation

In Text Citation Basics

Every citation style uses two types of citation: In text and Bibliographic.

In text citation gives credit to someone else's work in your paper, right when you use it. In APA style, an author/year system is used. If you are using an exact quote, you must also include the page number. When you introduce a quote or paraphrase, you typically include at least some of the information about the resource. For example, you can say that according to [author's name] (year of publication), and then use the quote. If you use a piece of identifying information in your signal phrase, the remaining information will be included in parentheses at the end of the sentence. 

Example :  According to Smith (2016), "Social media is harmful to teens" (p. 243). 

If there is more than one author, separate the names with commas and use an ampersand (&) before the last author. When you are using a direct quote, the citation begins after the end quotation mark. The period to end the sentence will come after the citation is complete.

Example : According to a 2012 study, "social media is harmful to teens" (Smith, Wheeler, & Jones, p. 65).

If you choose not to include any information in your signal phrase you can include it all at the end of your sentence, in parentheses.

Example :  It is true that social media is harmful to teens (Smith, Wheeler, & Jones, 2012). 

How to Cite with Missing Information

Sometimes you are missing information that you need to create an in text citation. Use the examples below to create an in text citation when you are missing information.

No Author If you do not have the author's name, you can use a short version of the title in quotation marks. Note that the comma will be inside the quotation marks.

Example :  A similar study was done of students who spend too much time browsing the internet ("Internet Browsing," 2015).

No Date If you do not have a date, use the abbreviation n.d. for "no date."

Example :  (Smith, Wheeler, & Jones, n.d., p.67)

Bibliographic Citation - References Page

Bibliographic Citation - References

Bibliographic citation is when you list the sources you've used in your paper.  On the very last page of your paper, you need to provide a list of all the outside sources you quoted or paraphrased in the text. In APA format, this list is called a "References" page. 

What should it look like?

Just like the rest of your paper, your References page should be in a readable font with 1-inch page margins. Your sources should be listed in alphabetical order by the first letter of the citation (usually the author's last name). Bibliographic citations also use a hanging indent which means all lines except the first should be indented for each individual citation or source. Not sure how to do that? Find directions below. See the References Example Page to get a better idea of what your page should look like.

Citing your Sources

You will need to gather some information from each of your sources, so it's best to have them in front of you. Remember, one of the reasons for citing is so that your reader can find the sources that you refer to. You need to provide as much information as possible so that they can find your sources easily. For most APA citations, the following rules apply:

Take a look at our APA Citation Guide for specific examples.

When citing books, you must include the author(s)'s name(s), the year of publication, the title of the book, and the name of the publisher. Sometimes you will need to include the names of editors or the edition number.  

Collins, S. (2010).  The hunger games . Scholastic, Inc.

When citing articles, you must include the author(s)'s name(s), the title of the article, the title of the journal, magazine, or newspaper, the volume and issue numbers, the date of publication, and the page number(s). 

Kirman, J., Siminerio, S., & Wong, Z. (2016). The impact of a therapy dog program on children's reading skills and attitudes towards reading.  Early Childhood Education Journal, 44 (6), 637-651.

When citing a website, or a page from a website, you need to provide the author(s)'s name(s), the title of the page you are using, the title of the website, the date the information was published, and the URL or web address of the site. 

Berger, F. K. (2014). Managing your depression.  Medline Plus. https://medlineplus.gov/ency/patientinstructions.

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APA In-Text Citations for Research Writing

how to cite sources in essay apa

Why Use In-Text Citations?

When writing a journal article, literature review, convention paper, or any other academic document, authors must include in-text citations whenever they refer to, summarize, paraphrase, or quote from another source. In addition, every time a work is cited within a paper (in APA style, a parenthetical citation), a corresponding entry must be included in the reference list.

How to Cite a Research Paper Using In-Text Citations

The rationale behind citing other people’s publications in your own manuscript is that you want to avoid intellectual dishonesty by giving credit to whoever reported a finding first or invented a specific technique. This is not only an ethical question, as being “sloppy” with your sources can easily be considered plagiarism (and even self-plagiarism , if you fail to refer to your own work), which can have legal consequences and damage your reputation.

General rules for what information should be provided when citing sources in a research paper vary across fields and depend on the type of source (e.g., books, journal articles, patents, conference proceedings, websites, etc.). We are not going into such differences here but will focus on the correct way of referencing other people’s research in your own paper according to one of the most common styles used to cite sources within the social sciences and in several other academic disciplines , that is, APA (American Psychological Association) style .

In research papers, in-text citations are most commonly used in the Introduction and Discussion Results sections. The following guidelines and examples are taken from the APA Publication Manual, 6th edition, 2nd printing , which details rules and application of APA style in research papers, including in-text citations, endnotes/footnotes, and references. For more information, consult the APA Style Manual website .

This resource provides detailed guidelines for citing sources in your paper and includes examples of in-text citations for reference by research authors. Before submitting your manuscript to a journal or publisher, be sure to use our free APA citation generator for your references and in-text citations.

APA Citation Rules: The Basics

Order and structure of in-text citation content.

When using APA format, follow the “author-date” method of in-text citation. Write the author’s last name and publication year for the source in parentheses and separate these pieces of information with a comma.

When referring to external work or referencing an entire work but not directly quoting the material, you only need to make a reference to the author and year of publication and not the page number in your citation.

The results of the first enzyme study (Chen et al., 2014) revealed several relationships.

If you mention the name of the author of the work in the sentence or earlier in the paragraph, you only need to include the year of publication in the citation.

Chen (2014) discusses several relationships revealed in this study.

Verb tense used in referring to other works

APA style requires authors to use past tense or present perfect tense (NOT present tense) when using signal phrases to refer to or discuss previous research (have a look at this article for more details on the correct tenses for different parts of a research paper ).

Radnitz (1995) found… / Radnitz (1995) has found…

Placement of in-text citations in the sentence (no quotation)

When referring to a specific work or works, place the citation (publication date only) directly after the author of the study referenced.

Klinge and Rogers (2010) found that mirroring is instrumental in developments of performative gender roles.

When giving information that reflects the results or implications of previous work, place the citation (author and publication date) at the end of the sentence.

Mirroring has been found to be instrumental in the development of performative gender roles (Klinge and Rogers, 2010).

Capitalization

Always capitalize author names and initials in in-text citations.

(r. kazinsky, 2014)    (R. Kazinsky, 2014)

In-Text Citation Rules for Short Quotations

When quoting directly from a work, include the author, publication year, and page number of the reference (preceded by “p.”).

Method 1 : Introduce the quotation with a signal phrase that includes the author’s last name; the publication year will follow in parentheses. Include the page number in parentheses at the end of the quoted text. Note that the quotation marks surround the text only, and not the parenthetical citation.

According to Khan (1976), “Graduate students tend to apply more diverse methods during their first two years of research” (p. 45). Khan (1976) noted that “graduate students tend to apply more diverse methods during their first two years of research” (p. 45), a fact that has profound implications for research departments.

Method 2 : If the author is absent in the signal phrase, include the author’s last name, the publication year, and the page number together in parentheses after the quoted text.

Researchers noted that “graduate students tend to apply more diverse methods during their first two years of research” (Khan, 1976, p. 45), but they did not offer a suggestion as to the cause.

In-text Citation Rules for Long Quotations

Long direct quotations are those with at least 40 words of quoted text in a row. Long quotes should be placed in a separate block of lines without quotation marks, similar to creating a new paragraph. Begin the quotation on a new line and indent 0.5in/1.27cm from the left margin. Type the entire quotation within these new margins using double-spacing. Include the parenthetical citation after the final punctuation mark.

Khan’s (1976) study found the following: Graduate students tend to apply more diverse methods during their first two years of research, especially when conducting research in teams of three or fewer with no senior researchers    present. This tendency could be attributed to either a misunderstanding of correct methodology or to a feeling of freedom to explore different approaches that the researchers have yet to employ. (p. 45)

Summarizing and Paraphrasing Other Works

When  paraphrasing another work , you only need to cite the author and year of publication in your in-text citation. It may be a good idea to include the page number as well if the paraphrased information is located on a specific page of the original text. APA guidelines encourage this inclusion but do not require it.

According to Khan (1976), new researchers tend to use more diverse methodologies. New researchers tend to use more diverse methodologies (Khan, 1976, p. 45).

Common Signal Phrases for Introducing External Works

Citing Works by Multiple Authors/Editors

When making an in-text citation of works by multiple authors, there are specific rules to follow depending on the number of authors of a publication and the number of times you cite the same works.

Citing Multiple Works in One In-text Citation

When citing more than one source in the same in-text citation, list all sources in the standard way and separate them with a semi-colon. List the sources alphabetically (by author’s last name or by title if no author is given) in the order they appear in the reference list.

(Marsh, 1997; Johnson, 2002). (Kazinsky, 2017; “Three Different Roads,”  2013).

Citing Works by the Same Author with the Same Publication Year

When citing two or more sources with the same author and year of publication, assign lowercase letters directly after the year of publication (a, b, c) according to the alphabetical order of titles. You will use the same alphabetical designations in your in-text citations that you do in your reference list.

The incidence of West Nile virus in Florida increased between 2002 and 2004 (Dickens, 2014a). According to Dickens (2014b), “these viral infections were precipitated by record levels of rainfall around the peninsula” (p. 150).

Citing a Work Quoted in another Source

Work quoted or paraphrased in another text is called a “secondary source.” While in your reference list you must cite the primary source as well, in your in-text citation you will add the words “as cited in” followed by the secondary source. For example, if a review article by Franklin you are citing includes a useful quote by Adams that supports your paper, your in-text citation would look like this:

According to a study by Adams (as cited in Franklin, 2016), 25% of all US federal prisoners have been diagnosed with some form of social disorder. Adams (as cited in Franklin) contends that this statistic “reflects the dehumanizing conditions of most federal institutions” (p. 76).

Citing Web Pages

Entire website.

When citing an entire website (with no specific webpage or article given), simply provide the title and web address within the text of your paper. No citation is needed in the References.

The American Psychological Association includes detailed information on how to apply APA citation (http://www.apa.org).

Webpage with author(s)

A webpage with an individual author or authors should be cited in the same way as other texts, with the name or names written first, followed by the publication year.

There were 523 new cases reported in 2011 alone (Kristoff, 2012).

Webpage with a group author

Treat group authors as individual authors in in-text citations, but instead of the author’s last name, include the name of the group.

Claustrophobia afflicts one in five Britons (The Surrey Group, 2003).

Webpage with missing information

Even when some central information is missing from a website (e.g., no author, date, or webpage title), you may still cite it as a source if you use the correct formatting. For information on how to cite a website with missing information, visit the APA Style Blog post on  Missing Pieces .

Citing social media sources

For a more comprehensive explanation of social media citation guidelines, visit the APA Style Blog post on  How to Cite Social Media in APA Style .

And when submitting your finished AP document to journals or for a class assignment, be sure to get professional English editing services , including academic editing , manuscript editing , and research paper editing services . Professional editors with experience in APA, AMA, MLA, and other popular style guides will make sure that your document’s citations and references conform to the journal of your choice.

Wordvice Resources

Wordvice provides a variety of other articles on topics such as the number of references your manuscript should contain , different citation styles if your target style does not use APA, and how to paraphrase correctly when citing sources in your paper, as well as more general advice on how to write research papers on the Wordvice academic resources website .

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