APA Style® is a style of writing and formatting that is created and updated by the American Pyschological Association. APA style is most commonly used in the social sciences and health sciences. It contains guidelines for formatting and structuring research papers, reference citations, case studies, literature reviews, and term papers. It concerns uniform use of such elements as
APA Style rules and guidelines are found in the sixth edition of the Publication Manual of the American Psychological Association. The American Psychological Association maintains a page of supplemental materials that are referenced from, but not printed in, the actual manual.