The current version is entitled:
Publication Manual of the American Psychological Association, 5th Edition.

It is published by the American Psychological Association.

More information can be found at the APA's site:
http://www.apa.org/books/pubman.html

What does the manual cover?

• Content and Organization of a manuscript
  
  
• Expression of ideas - style, grammar, reducing bias
  
  
• APA Editorial Style - includes references, statistics, tables, and graphs. This is a crucial section. References give students fits and professors regard them as one of the most important parts of a paper. We could give examples of references but there are so many different parameters that you would quickly find one that we didn't cover. It's best to buy the book and program.
  
  
• Manuscript preparation - margins, paper, headings, spacing - all the stuff that professors grade you on.