Corporate Author. Year. “Title of Document.” Location (if known): Institution or Organization. Retrieved Jan 1 2000 (http…).
If a web site has no author, then list it by the institution or organization that publishes it on the web:
British Broadcasting Corporation. “Reasons People Choose Atheism.” British Broadcasting Corporation. Retrieved November 18, 2011 (http://www.bbc.co.uk/religion/religions/atheism/beliefs/reasons_1.shtml).
American Sociological Association. “Quick Style Guide. “ Washington, DC: American Sociological Association. Retrieved November 18 2011 (http://www.asanet.org/Quick%20Style%20Guide.pdf).