The MLA 7th Edition no longer requires the inclusion of web URLs unless "the reader probably cannot locate the source without it or when your instructor requires it."
Basic Format (Website)
Author's name (if available). "Title of the Work." Title of the site. Version or edition used, if applicable. Publisher or sponsor of the site; if not available, use N.p., Date of publication (day, month and year, as available; if not available, use n.d.). Medium of publication (Web). Date of access (day, month, and year).
If you cannot find some of the information listed above, cite what is available.
Lessig, Lawrence. "Free Debates: More Republicans Call on RNC." Lessig 2.0. N.p., 4 May 2007. Web. 15 May 2008.
Basic Format (for a Specific Article/Page on a Website)
If your source does not appear in this guide or for further information or examples, consult the MLA Handbook for Writers of Research Papers (Call Number: Ref LB2369 .G53 2003 ) available in the Ready Reference Collection at the Information Desk or in the Reference Collection. You can also refer to the Instruction Office's list of resources; we specifically recommend Purdue's Online Writing Lab (OWL). You can also contact the SIUE Writing Center or visit MLA's site.Updated April 16, 2009