The Publication Manual of the American Psychological Association is the style manual of choice for writers, editors, students, and educators in the social and behavioural sciences. It provides invaluable guidance on all aspects of the writing process, from the ethics of authorship to the word choice that best reduces bias in language. Well-known for its authoritative and easy-to-use reference and citation system, the Publication Manual also offers guidance on choosing the headings, tables, figures and tone that will result in strong, simple, and elegant scientific communication. The Sixth Edition offers new and expanded instruction on publication ethics, statistics, journal article reporting standards, electronic reference formats, and the construction of tables and figures. The Sixth Edition has been revised and updated to include new ethics guidance on such topics as determining authorship and terms of collaboration, duplicate publication, plagiarism and self-plagiarism, disguising of participants, validity of instrumentation, and making data available to others for verification; new journal article reporting standards to help readers report empirical research with clarity and precision; simplified APA heading style to make it more conducive to electronic publication; updated guidelines for reducing bias in language to reflect current practices and preferences, including a new section on presenting historical language that is inappropriate by present standards; new guidelines for reporting inferential statistics and a significantly revised table of statistical abbreviations new instruction on using supplemental files containing lengthy data sets and other media; significantly expanded content on the electronic presentation of data to help readers understand the purpose of each kind of display and choose the best match for communicating the results of the investigation, with new examples for a variety of data displays, including electrophysiological and biological data; consolidated information on all aspects of reference citations, with an expanded discussion of electronic sources emphasising the role of the digital object identifier (DOI) as a reliable way to locate information; and expanded discussion of the publication process, including the function and process of peer review; a discussion of ethical, legal, and policy requirements in publication; and guidelines on working with the publisher while the article is in press.