The Publication Manual of the American Psychological Association provides detailed guidelines for using APA style. The most recent (6th) edition of the APA Publication Manual is kept on the Reference shelves.
American Psychological Association. (2010). Publication manual of the American Psychological Association. (6th ed.). Washington, DC: American Psychological Association.
There are various online tools that will generate both in-text and bibliographic citations. Listed below are some helpful websites and tools that can create citations from your source. However, it is important to keep in mind that these tools are not fool-proof. Some may not be using the current style manual edition, and some may incorrectly generate a citation. It is up to you to double-check the generated citation with the latest style manual.