American Psychological Association (APA) style is a writing format used in the social sciences, particularly in Psychology. It dictates the format of a paper's cover page, abstract, body and in-text citations, and references used. The APA Style Guide is currently in its 6th edition (2010), so always double-check your sources to ensure they are using the most current rules.
Book with One Author
LastName, FirstInitial. (Year of publication). Title of book. Place of Publication: Publisher.
Book with Two or More Authors
LastName, F.I., & LastName, F.I. (Year of publication). Title of book. Place of Publication: Publisher.
Book with No Authors
Title of book. (Year of publication). Place of Publication: Publisher.
Online and Print Journal Article
LastName, F.I. (Year of publication). Title of article. Title of Journal, volume number(issue), pages.
The same format applies for magazine and newspaper articles with a few exceptions. With magazines and newspapers, you will cite the date in (Year, Month Day). format. If there is no author, the publication date will go after the article title. Newspaper articles do not require an author.
LastName, F.I. (Publication date). Title of web page. Retrieved from www.123.com
If your citation carries down to a second line, make sure to indent the second line one tab.
NOTE: The titles of books and articles have unique capitalization rules. You will only capitalize the first word of the title, the first word after punctuation in the title, and proper nouns. For example, the book Nebraska Nursing: A Comprehensive Guide will be cited as Nebraska nursing: A comprehensive guide. While book and article titles follow these rules, the title of the actual journal will always be fully capitalized.
Example of an APA title page, including title, name, institution, and running head
Courtesy of OWL at Purdue University