The APA Manual is the gold standard for writing, formatting and citation in the field of psychology.

• Title: Publication Manual of the American Psychological Association. 6th ed.
  Publisher: Washington, DC: American Psychological Association, 2010.
  Call number: MAIN Reference & SCHAFFNER Reference 029.6 A513p 2010
  
  See also:
  • APA Formatting and Style Guide (from the OWL at Purdue)
  • APA Lite for College Papers (from docstyles.com)
  • Frequently Asked Questions About APA Style (from APA Style)
  • APA Style Blog is the official blog for news and comments on APA style and includes tips for various types of references such as:
    
    
    • How to Cite Something You Found on a Website in APA Style
    • How to Cite Recorded Music in APA Style (+ Playlist)
    • How to Create a Reference for a YouTube Video
    • How Do You Cite an E-Book (e.g., Kindle Book)?
    • I Can't Find the Example Reference I Need in the Publication Manual. What Should I Do?