Information about formatting a Works Cited page can be found here at the Purdue Online Writing Lab.
Works Cited information for your sources can be found at the bottom of any article you look up. It will be under "Source Citation" and will look something like this:
"John Fitzgerald Kennedy." Encyclopedia of World Biography. Detroit: Gale, 1998.Biography in Context. Web. 25 Nov. 2013.
For now, just make sure you have the information on a page after your biographical summary. We'll worry about proper format later.