For web sources, give the author (if known), the title of the page, the complete URL (= the address of the web page, which you can get either in the menu bar of Netscape or by selecting "Page Info" under the "View" menu in Netscape), and the date on which you accessed the site.

So for example:

Joseph Incandela, "Catholic Social Thought Online Resources," Available: http://www.saintmarys.edu/~incandel/CST.html (January 1, 2000).