Style Guide: Understanding Electronic Resources for MLA Citing
Article in an Online Reference Source Originally Published in a Book
Reference Source: Biographies Plus Illustrated

What is it?
An article from a reference book.

Where did you get it?
From an online reference source.

Citation:

"Roosevelt, Eleanor." Chambers Biographical Dictionary 1997. Chambers Harrap, 1997.
Biographies Plus Illustrated. Wilson Web. 8 Dec. 2003 <http://vnweb.hwwilsonweb.com>.

No author given
"Roosevelt, Eleanor." -through- Chambers Harrap, 1997. -- Information for the print version.
No place or page numbers given
Biographies Plus Illustrated. -- Title of the reference source
No publication date for electronic version given
Wilson Web. -- Name of the reference source provider
8 Dec. 2003 -- Date page was accessed
<http://vnweb.hwwilsonweb.com>. -- MLA allows use of URL for the search page if the URL for the article is too complex.

All information available for citing is given on the page with the article: