References to an individual page within a larger website usually include the following elements:
Person who created the site (if known) last name, first name. "Title of the Page or Section." Title of Website. Name of the institution associated with the site; if not given, use n.p. Date of publication; if not given, use n.d. Medium of Publication (Web). Day Month Year of Access.
When there is no known author or editor:

When the author or editor is known:

* Note: Citations are single-spaced here, but be sure to double-space your Works Cited page.