Gibaldi, Joseph. MLA Handbook for Writers of Research Papers.
New York: Modern Language Association of America, 2009.
The sixth edition is available at the IC, Cudahy, Lewis, and Rome Reference sections: LB2369 .G53 2003. The seventh edition is on order.
Generally, MLA documentation and formatting is used by the disciplines associated with the Modern Languages Association (hence MLA). These include English and Foreign Languages. One would also likely use MLA in freshman writing courses (UCWR 110).