The official source for APA Style. The Publication Manual of the American Psychological Association, Seventh Edition is the style manual of choice for writers, researchers, editors, students, and educators in the social and behavioral sciences, natural sciences, nursing, communications, education, business, engineering, and other fields.
Provides free resources, instructional aids, and supplemental content that is referred to throughout the manual (reference examples, sample papers, etc).
RefWorks is a web-based bibliography and database manager that allows you to create your own personal database by importing references from text files or online databases and other sources. You can use these references in writing papers and automatically format the paper and the bibliography in seconds. Click on the link. Once there, you'll just need to sign up with your university email.
Zotero is a free, easy-to-use tool to help you collect, organize, annotate, cite, and share research. Zotero allows you to attach PDFs, notes and images to your citations, organize them into collections for different projects, and create bibliographies. It is available for Windows, Mac, and Linux.
Publication Manual of the American Psychological Association by 
