APA Style: A Guide to Format, Citations, and Manuscript Conventions

Core principles

At its heart, APA emphasizes clarity, precision, and consistency. Common features include concise headings, clear display of statistical information, guidance for reducing biased language, and a preference for the author–date citation system. In-text citations typically include the author's surname and year of publication, with a corresponding entry in the reference list that provides full source details.

Manuscript elements

• Title page: identifies the paper's title, author(s), and institutional affiliation, following edition-specific rules.
• Abstract: a brief summary of the study's purpose, methods, results, and conclusions when required.
• Headings: organized hierarchy of headings to structure content logically.
• Reference list: alphabetized list of sources cited in the text with detailed publication information.
• Tables and figures: formatted and captioned to be understandable on their own.

Citation and reference examples

APA uses the author–date method for most in-text citations: a parenthetical citation might appear as (Smith, 2020) for paraphrases, with page numbers added for direct quotations, for example (Smith, 2020, p. 15). Reference entries vary by source type — books, journal articles, web pages — and include elements such as author name(s), year, title, and source. Digital object identifiers (DOIs) are used when available and web sources require retrieval information per the manual.

History and development

APA style evolved to meet the needs of psychological researchers seeking consistent reporting standards. Over several editions the manual has expanded to address electronic sources, data reporting, and inclusive language. The seventh edition clarified reference formats for online content, simplified heading and citation rules for student papers, and updated guidance on bias-free writing.

Uses, distinctions, and further resources

APA is widely adopted across psychology, education, sociology, nursing, and other social science disciplines. It differs from MLA (humanities-oriented) and Chicago (flexible, often used in history) in citation mechanics and manuscript conventions. For practical examples of citation formats and answers to common questions, consult official resources and style guides: citation help and the publisher's guidance at official APA resources.