There are no definitive guidelines for citing electronic sources.
Find
out what your teacher wants you to site. Most teachers will
want you to include: Author
(if known), Title of the page. Institution (if available). Access Date.
URL. Here is a sample for this site:
Holidays, W., Purim at
Web
Holidays. Web Holidays,
Inc.
June 2, 2003.
www.web-holidays.com/purim/.