BF 76.7.P83 2001 (Permanent Reserve, Circulation Desk)
This is the most exhaustive "official" outline of APA Style. The "Reference List" (bibliography) is discussed on pages 215-281, with specific examples for printed materials on pages 239-265.
However, most questions about APA Style, especially those concerning electronic/online sources, can be answered with the following:
This resource, part of Diana Hacker's Research and Documentation Online site, answers most questions.
It is more up-to-date than any of the other guides on this page, an important issue because of its superior coverage of electronic/online sources.
Both of the following printed guides are excellent short-cut resources.
In printed form.
Hacker's excellent guide for student writing is recommended by W&L's Writing Program Advisory Committee. APA Style for a bibliography ("APA references") is summarized on pages 396-404.
In printed form
Booklet supplements Hacker's A Writer's Reference (above), supplying a brief outline of "the essentials."