The reference format for APA Style is described in the sixth edition of the Publication Manual of the American Psychological Association, which is a large reference book that contains hundreds of guidelines on how to format references, statistics and tables, as well as punctuation and grammar. It also contains writing tips and instructions about how to format manuscripts. For more information, please see the APA Style site.
The primary reference for APA Style is the sixth edition of the Publication Manual of the American Psychological Association. Information on this book and several companion products can be found on the APA Style Web pages.