The 8th edition of the MLA Handbook substantially changes how citations are formed.
All citations now follow one basic "core element" standard.
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
MLA: Citing an eBook (8th edition) from Lawrence W. Tyree Library on Vimeo.