Information about citing e-mail messages, websites with no author, entire websites, and more can be found in the APA Style Frequently Asked Questions page under the References section.
The Purdue OWL has a detailed page with examples of electronic resources in APA format.
Inside your paper, give credit to the works you quote and the ideas you use.
See examples of how to tell your readers where facts, paraphrases, or quotes in your paper come from at this site from the Purdue OWL.
The APA Style website provides an overview of information regarding citations in text of electronic material on the APA Frequently Asked Questions page, including:
The general rule for citing Web pages in APA format is to include as much information as possible.
Author's Last Name, Author's First Initial. Author's Middle Initial. (Year, Month Day
of publication). Title of document. Retrieved from http://webpage address
Doctorow, C. (2009, August 13). Photos of science fiction writers' nests. Retrieved
from http://www.boingboing.net/2009/08/13/photos-of-science-fi.html
When there is no author for a Web page, the title of the page takes the place of the author and is listed first. If there is no date available, use (n.d.), which stands for "no date". If the website URL you are citing runs onto the next line, be sure to break the address after a "/" (http:// is an exception).
Title of document. (Year, Month Day of publication). Retrieved from
http://webpage address
Tenn. couple accused of assault using Cheetos. (2009, June 27). Retrieved from
http://www.msnbc.msn.com/id/31580100/ns/us_news-weird_news/