APA Style Citation: A Complete Guide for Academic Writers

Whether you're submitting a journal article to a peer-reviewed publication, writing a research paper, or completing a graduate thesis, understanding APA style citation is essential. The American Psychological Association (APA) format provides a standardized way for authors to cite their sources, making it easy for readers to locate references and verify the research behind any academic document. Publishers like Elsevier and hundreds of other academic journals require APA formatting for all submissions.

APA style citation allows authors to reference material from peer-reviewed articles, books, websites, videos, software, and more. There are two components to every APA style citation: the in-text citation that appears within the body of the paper, and the full reference entry that appears in the reference list at the end of the document. This guide covers both, along with the most commonly asked questions about APA citation format.

In-Text Citations in APA Format

In-text APA citations follow a consistent pattern: the last name of the author or authors, followed by the year of publication, placed in parentheses. This citation typically appears at the end of the sentence in which the source is referenced.

· Researchers have hypothesized several mechanisms for the function of sleep (Rasch, 2001).

If a publication has two authors, both names are included in the parenthetical citation.

· Researchers have hypothesized several mechanisms for the function of sleep (Rasch & Born, 2001).

When a publication has three or more authors, only the first author's last name is used, followed by "et al.," which means "and others" or "and colleagues."

· Researchers have hypothesized several mechanisms for the function of sleep (Rasch et al., 2001).

Authors can also cite a reference within the sentence itself rather than in parentheses at the end. When the author's name appears in the sentence, the year of publication follows in parentheses immediately after the name.

· Rasch (2001) has hypothesized several mechanisms for the function of sleep.

For two-author publications cited within a sentence, both authors' names are included. For three or more authors, only the first author's last name is used followed by "et al."

· Two authors: Rasch and Born (2001) have hypothesized several mechanisms for the function of sleep.

· Three or more authors: Rasch et al. (2001) have hypothesized several mechanisms for the function of sleep.

In summary, in-text APA style citations follow a basic pattern of author name and publication date. Up to two authors are named in the citation. When a publication has three or more authors, only the first author is named, followed by "et al."

Reference List Citations in APA Format

Every APA style paper requires a reference list at the end of the document. The reference list provides full details for every source cited within the paper and allows readers to locate those sources independently.

References in the list are ordered alphabetically by the authors' last names. Each entry uses a hanging indent format: the first line of each reference is left-aligned, and any additional lines are indented. This makes it easy to visually distinguish between individual citations.

Authors' last names and initials are used in the reference list, including initials for first and middle names where given (e.g., Rasch, A. L., & John, K. E.). All authors of a publication are typically listed. When a citation has 20 or more authors, only the first 19 and the last author are included, with an ellipsis between them.

The title of the publication follows the author information. In APA format, only the first word of the title is capitalized, along with any proper nouns. The academic journal name is listed in italics, followed by the volume number (also in italics), the issue number in parentheses, the page range, and the Digital Object Identifier (DOI) if one is available.

· Last Name, Initial., & Last Name, Initial. (Year). Title of the academic article. Journal Name, Numerical Volume(Numerical Issue), page number range. DOI

· Fisher, P. J., & Yao, R. Gender differences in financial risk tolerance. Journal of Economic Psychology, 61(1), 191-202. https://doi.org/10.1016/j.joep.2017.03.006

Authors may cite many different types of sources in APA format. While journal articles and books are the most common, reference lists often include websites, videos, reports, and other source types. Each source type follows its own specific formatting structure. The most common formats are outlined below.

Authored Books:

Last Name of the Author, First Initial. Middle Initial. (Year of Publication). Title of the book. Publisher of the book. DOI when available

Jackson, L. M. (2019). The psychology of prejudice: From attitudes to social action (2nd ed.). American Psychological Association. https://doi.org/10.1037/0000168-000

See the APA Style website for more details on formatting authored book citations.

Edited Books:

Last Name of the Editor, First Initial. Middle Initial. (Year of the Publication). Title of the book: Subtitle. Publisher. DOI when available

Rasch, P. (Ed.). (2022). A boundless science. Penguin.

See the APA Style website for more details on formatting edited book citations.

Websites:

Last Name of the Author, First Initial, Middle Initial. (Year of Publication, Month Date). Title of the article on the website. Publisher of the website. URL of the website

Rasch, P. (2022, May 22). A boundless science. Nature Science Sites. https://naturescience.blog

See the APA Style website for more details on formatting website citations.

The general structure for every APA style citation includes five key elements: the author or authors, the title, the year of publication, the publisher, and the source such as a DOI or URL. Understanding these five elements is the foundation for using APA format correctly, whether you're formatting citations manually or using a citation manager to automate the process.

Citation Managers That Automate APA Style Citations

Most academic writers today use citation managers to automate their APA style citations rather than formatting each reference manually. Understanding the basics of APA formatting is still important so you can verify that your citation manager is producing accurate output.

The most widely used citation managers are EndNote, Zotero, and Mendeley. Each of these tools lets you build a personal database of references and insert citations directly into Microsoft Word while you write, using a simple plug-in. You can add references to your database by DOI, ISBN, or browser extension, making it fast to build and maintain a large citation library.

Citation managers also generate and update your reference list automatically. Any source you cite in the text is added to the reference list, and the list is reorganized alphabetically any time you add or remove a citation. This saves significant time on longer academic papers and eliminates the risk of formatting errors.

Once you're comfortable with the fundamentals of APA style citation, you can use citation managers confidently and spend your time on the writing itself rather than on formatting details.

APA Style Citation: Frequently Asked Questions

How do I cite a journal article with one author in the text of my paper?

When you're citing a journal article with one author within your text, include the author's last name and the year of publication. If you're using a direct quote, also include the page number. For example: "Ioannidis (2024) found that X is related to Y." If the author's name doesn't appear in the sentence, place the citation in parentheses at the end: "X is related to Y (Ioannidis, 2024)." Note that you use and when the author's name is part of the sentence, and the ampersand symbol (&) when the citation is in parentheses.

How do I cite a journal article with two authors in my reference list?

In your reference list, include both authors' last names and initials, the year of publication, the article title, the journal name in italics, the volume number in italics, the issue number in parentheses, and the page range. For example: Ionnidis, A. B., & Josephs, F. M. (2024). Journal article title. Journal Name, 24(1), 16-34. The journal name and volume number are italicized.

What's the latest edition of the APA Style Guide?

The latest edition of the APA Style Guide is the 7th edition, published in 2019. It replaced the 6th edition, which was published in 2009. If you're unsure which edition your institution or journal requires, check their submission guidelines before formatting your citations.

What's the difference between an in-text APA citation and a reference list entry?

An in-text APA citation is the short reference that appears within the body of your paper, typically showing the author's last name and year of publication. A reference list entry is the full citation that appears at the end of your paper, including all the details a reader would need to find the original source. Every in-text citation must have a corresponding entry in the reference list.

Do I need to include a DOI in every APA style citation?

You should include a DOI in your APA citation whenever one is available. A DOI is a permanent digital link to the source and makes it easy for readers to locate the original article. If no DOI is available for a journal article, you can include the journal's homepage URL instead. For books and other sources without a DOI, no URL is required unless the source was accessed online.

If you need help ensuring your APA style citations and reference list are formatted correctly, the professional academic editors at Editor World can review your entire document and confirm every citation meets APA format requirements.