Until the Chicago Manual of Style is again revised, please
use the Publication Manual of the American Psychological Association,
4th ed. (Washington, DC, American Psychological Association, 1994) for
citing electronic documents particularly pages 218-222.
For the most recent rules for citing email, Web documents, and articles
and abstracts from electronic databases see www.apastyle.org/elecref.html
Other useful printed sources are:
Li, Xia and Nancy B. Crane. 1996. Electronic styles: A handbook for citing electronic information. Medford, N.J.: Information Today.
Harnack, Andrew and Eugene Kleppinger. 1997. Online! A reference guide to using Internet sources. New York: St. Martin's Press.
Walker, Janice R. and Todd Taylor. 1998. The Columbia
Guide to Online Style. New York: Columbia University Press.