The Online Writing Lab at Purdue ( owl.english.purdue.edu/owl/resource/747/01/ ) is a fantastic resource, and all questions for MLA citations should probably run through that website first. That said, if you're a proponent of handouts, here is a pair of pretty solid MLA citation guide handouts that you could distribute to your students. The first is from Grossmont College, and the second is from Chabot College. Though neither is well known in the world of writing studies, both have put together pretty spiffy citation handouts. See which one you prefer!