This free online encyclopedia allows users to view, edit, or create entire articles. Sometimes it's good, sometimes not, but it's rarely the same thing twice. Credibility varies wildly.
7 Things You Should Know About Wikipedia
Alternatives to Wikipedia:
ProQuest Ebook Central (formerly ebrary) contains many reference books. You can search for the general subject you are interested in, along with terms like "dictionaries," "encyclopedias," "handbooks," or "guides." Click HERE for direct access to the ebrary interface.
