How to Organize References in APA Style

A well-organized reference list helps readers identify and locate the sources behind your claims. APA style usually calls this list “References”; it is not simply a bibliography of everything you read. Include sources cited in the text, and make sure each in-text citation has a matching reference entry.

Before you begin, identify which APA edition your instructor, publisher, or organization requires. The steps below describe APA 7, the current commonly used edition. Local instructions can add requirements, so follow them when they differ from general guidance.

What You’ll Need

Your paper’s in-text citations, including citations in tables, figures, and notes.
Reliable source details: author or organization, date, title, publication or website name, and DOI or URL where relevant.
A word processor with paragraph and page-formatting controls, or an APA-compatible reference manager.
Your instructor’s formatting instructions, if applicable.

Step-by-Step

Collect every cited source. Read through the paper and note each work cited in the text. Include sources cited in captions, tables, and figure notes. Do not add a source only because you consulted it; APA reference lists generally contain works cited in the paper. Conversely, do not leave a citation without a corresponding reference.
Verify the source information. Open the original article, book, report, or webpage rather than relying only on search snippets or a citation generator. Record the author names as published, publication date, full title, source or publisher information, and DOI or URL when required. A DOI should be presented as a link in the form https://doi.org/ followed by its identifier. Never guess missing information.
Start the list on a new page. Put the heading References at the top, centered and bold, using the same font and size as the paper’s text unless your instructions say otherwise. Do not underline it, put it in quotation marks, or add a colon. Keep the page number and margins consistent with the rest of the paper.
Build each entry from its source type. APA formats differ for journal articles, books, chapters, webpages, reports, and other materials. Arrange the elements in the order and punctuation required for that type. For a journal article, for example, details commonly include authors, year, article title, journal title, volume and issue, page range or article number, and DOI if available. Use the official APA guidance for less common sources.
Alphabetize the entries. Sort by the surname of the first author, then by initials when the surnames match. For the same author, place works in date order, generally oldest first; works with no date follow dated works. If an author has multiple works from the same year, distinguish them with lowercase letters such as 2022a and 2022b, and use the same letters in the in-text citations.
Apply author and organization rules. List authors in the order shown on the work, using surname followed by initials. APA 7 generally lists up to 20 authors before using an ellipsis and the final author; check the manual for the exact rule when a work has more than 20. If an organization is the author, spell out its name in the reference entry. Do not repeat the publisher when it is the same organization as the author.
Format the page consistently. Double-space the entire list, including between entries. Align the first line of each entry with the left margin and indent later lines by 0.5 inch; this is a hanging indent. In many word processors, select the entries and use the paragraph settings for a hanging indent rather than inserting spaces or tabs by hand. Keep the entries in one continuous list unless your assignment specifically requests another arrangement.
Check capitalization and italics. Article, chapter, and webpage titles are usually in sentence case: capitalize the first word, the first word after a colon or dash, and proper nouns. Journal titles use title case and italics; journal volume numbers are italicized, while issue numbers in parentheses are not. Book and report titles are generally italicized and use sentence case. Follow the source-specific APA pattern rather than applying one rule to every title.
Match citations and references. Compare each in-text citation with its entry. Confirm that author names and years agree, including any a/b year suffixes. Then scan the list in the other direction: each entry should be cited in the paper, except for formats that explicitly allow additional reading. Correct mismatches before submitting.

Common Mistakes

Sorting by title: Alphabetize by the first author’s surname, not by the title, unless the work has no author. For a no-author work, use the title’s first significant word and ignore initial A, An, or The when applying APA’s rule.
Mixing reference and bibliography rules: A reference list records cited sources. Do not add uncited reading just to make the list longer unless your assignment asks for a bibliography.
Using a plain indent: Indenting every line or adding spaces manually can make the layout uneven. Use a hanging indent setting.
Inventing a date or author: If information is absent, use the appropriate APA treatment for missing information. Do not infer a publication date from a page footer or assume a website owner wrote an unsigned page.
Leaving out a DOI or adding a retrieval date unnecessarily: Include a DOI when the source has one. Retrieval dates are generally for content designed to change over time, not every ordinary webpage.
Trusting generated citations without review: Tools may misread capitalization, author order, page ranges, or source type. Treat generated entries as drafts and verify them.

Tips

Save complete citation details as soon as you use a source; locating them later can be difficult.
Choose one reference manager or a consistent manual workflow, then review its output against APA rules.
Use word-processor styles for the References heading and paragraph formatting so changes apply consistently.
For web sources, record the page title, credited author or organization, date if shown, site name when needed, and stable URL. A website name is not automatically the author.
Keep a separate note of sources you read but did not cite, so you do not accidentally mix them into the reference list.

Troubleshooting

An entry will not sort neatly: Check whether the author is a person, group, or absent. Apply the relevant APA rule, and sort multiple works by the same author by date. Do not alphabetize a group-author entry under an abbreviation unless the group is actually named that way on the source.

The source has no date or author: Consult the page or publication carefully to see whether a responsible organization or date is identified. If information is genuinely missing, use APA’s prescribed “n.d.” treatment for no date and the appropriate title-first format for no author. Make the in-text citation correspond to the resulting entry.

Your hanging indent or spacing keeps changing: Select all reference paragraphs and reset paragraph spacing and indentation together. Remove manual tabs and extra blank lines, then apply double spacing and a 0.5-inch hanging indent. Check the printed or exported document because page layout can shift during conversion.

A reference generator gives conflicting results: Confirm the source type and compare the entry with APA’s official examples. If an assignment provides its own template, use that template; otherwise, consult the APA Style website or Publication Manual for unusual sources.

Frequently Asked Questions

Should references be in alphabetical order?

Yes. APA reference entries are generally alphabetized by the first author’s surname. Use the organization’s name for group authors and the title-first rule when no author is identified.

Does APA use a hanging indent?

Yes. The first line begins at the left margin, and each following line in the same entry is indented 0.5 inch. Apply it with paragraph settings for a clean, consistent result.

Do I include sources I read but did not cite?

Usually not. The References list should include works cited in the paper. Add uncited works only if your instructor or publication asks for a bibliography or another broader reading list.

Should I include a URL for every source?

No. Include a DOI when one is available, and include URLs for sources that readers can access online when APA calls for them. Do not add a database URL for a standard academic article retrieved from a common research database unless a specific rule requires it.

What if a source has no publication date?

Use “n.d.” in the date position when no date can be established, and make sure the in-text citation uses the same date treatment. Check the source carefully first; do not substitute the date you accessed it unless APA guidance calls for a retrieval date.

Which APA edition should I follow?

Use the edition named by your instructor, school, or publisher. If no edition is specified, APA 7 is commonly used, but confirm the requirement before finalizing the paper.

Further reading: American Psychological Association. Details can change, so check the official page for anything that matters to you. Spotted a mistake? Tell us. How we write an answer.