APA Citation Guidelines — Official Rules Explained Simply
Updated May 2026 | APA 7th Edition
APA citation guidelines are the official rules published in the APA Publication Manual, 7th Edition (2020). The core guidelines require: author-date in-text citations, a formatted reference list at the end, and source-specific formats for 20+ source types. This free guide covers the essential APA 7th edition guidelines used in 2026.
Core APA Citation Guidelines at a Glance
| Guideline | Rule |
|---|---|
| In-text citation system | Author-date: (Smith, 2023) |
| When to cite | Every quote, paraphrase, or summary of another's work |
| Direct quote requirement | Include page/paragraph number: (Smith, 2023, p. 45) |
| Author listing in citations | 3+ authors: First author et al. — (Smith et al., 2023) |
| Organization as author | Use full name first time, then abbreviation: (American Psychological Association [APA], 2020), then (APA, 2020) |
| Reference list title | "References" — centered, bold |
| Reference order | Alphabetical by first author's last name |
| Reference formatting | Hanging indent, double-spaced |
| DOI requirement | Include DOI whenever available, formatted as https://doi.org/... |
| URL formatting | Live hyperlink (no angle brackets, no "Retrieved from") |
When You Must Cite in APA
You must include an APA citation whenever you:
- Quote another author's words directly
- Paraphrase another author's ideas in your own words
- Summarize a source's argument or findings
- Reproduce a table, figure, or image from another source
- Reference a specific statistic, fact, or claim that is not general knowledge
You do NOT need a citation for: your own original analysis, well-known facts (water boils at 100°C), proverbs, or content you created yourself.
APA Guidelines for Specific Source Situations
Citing the Same Source Multiple Times
Use the same (Author, Year) format each time. Within a single paragraph, if the same source is cited throughout, you may omit the year on subsequent citations after the first, but include it at least once per paragraph.
Multiple Sources in One Citation
When citing multiple sources for the same claim, list them alphabetically within the parentheses, separated by semicolons: (Jones, 2021; Smith, 2023; Williams, 2022).
Sources Without Dates
Use (n.d.) for sources without an identifiable publication date. This applies most often to websites that do not display a date. Example: (World Health Organization, n.d.).
Use the free APA citation generator to apply all these guidelines automatically.
Frequently Asked Questions
What are the official APA citation guidelines?
The official APA citation guidelines are published in the Publication Manual of the American Psychological Association, 7th Edition (2020). This 428-page manual is the definitive source for all APA rules. It covers paper structure, citation formats, reference types, writing style, bias-free language, and statistical reporting. The APA also maintains free resources at apastyle.apa.org.
What does APA stand for in citation?
APA stands for the American Psychological Association, a scientific and professional organization for psychologists in the United States. The APA first published its writing and citation guidelines in 1929 to standardize scientific reporting. The system has since been adopted widely across social sciences, education, business, nursing, and other disciplines.
Are APA citation guidelines free to access?
The full APA Publication Manual (7th edition) costs approximately $35 USD and is available from apa.org. However, free resources exist: the APA Style website (apastyle.apa.org) provides free guidance on many topics, Purdue OWL covers APA formatting, and this site provides free citation tools and guides. Most university libraries also provide access to the manual.
Do APA guidelines require page numbers for all citations?
No. Page numbers are required in APA in-text citations only for direct quotes: (Smith, 2023, p. 45). For paraphrases and summaries, page numbers are optional but encouraged — they help readers locate specific passages. When citing an e-book without page numbers, use paragraph numbers: (Smith, 2023, para. 3) or section names: (Smith, 2023, Introduction section).
What are APA guidelines for citing AI-generated content?
APA 7th edition (updated 2023) provides guidance on citing AI tools like ChatGPT. Treat the AI as the author. Example: OpenAI. (2024). ChatGPT [Large language model]. https://chat.openai.com. For in-text: (OpenAI, 2024). Note: APA guidelines advise against over-reliance on AI content in academic work. Always check your institution's policy on AI use before citing AI-generated text.
What are APA guidelines for citing lecture notes?
For lecture notes posted online (e.g., on Canvas or Blackboard): Instructor Last, F. (Year). Lecture title [Lecture notes]. Platform. URL. For in-person lectures without posted materials: Instructor Last, F. I. (Year, Month Day). Lecture title [Lecture]. University Name. Treat in-person lectures as personal communications if the content is not publicly accessible.
Do APA guidelines allow footnotes?
APA uses footnotes sparingly. Content footnotes may be used to add supplementary information that would interrupt the paper's flow but is too important to omit. Copyright permission footnotes are required when reprinting or adapting tables, figures, or long quotes. APA does NOT use footnotes for citations — citations are always in-text parenthetical references.
What are APA guidelines for citing a whole website (not a page)?
When citing an entire website (not a specific page), you do not create a reference list entry. Instead, include the URL directly in the text: "The American Psychological Association (https://www.apa.org) provides resources for students and professionals." Only create a reference list entry when citing a specific page, article, or document on a website.