I'm currently using the mla-good.bst file for natbib (available as mla-good.bst.zip), but I suppose I don't really care if I use APA or MLA, so I may switch later. The problem I am having is that I can't figure out a way to add URL access dates to the bibliography. I would like to add notes to the sources in the bibliography that state the date an online material was retrieved.
Unfortunately, I cannot find any good way to do this. I've seen methods of doing this using MLA and APA formats for biblatex, but none for natbib.
Perhaps I should consider switching to biblatex, but I'm still fuzzy on the differences (advantages/disadvantages) of using biblatex versus natbib.