One of the best guides to the MLA style of referencing is the Purdue University OWL site.
Another great university site for examples of MLA style is Utica
Guide based on the work of Nadine Bailey at Western Academy of Beijing.
MLA is the default formatting style for referencing at SAS Puxi.
MLA requires in-text citations, NOT footnotes. (However, footnotes may be used in MLA for explanatory information.)