If you are writing a paper for which you are consulting resources, using quotes, or citing data, you must always document (cite) the resources you use. The Department of Expeditionary Studies has adopted, as its standard citation tool, the MLA (Modern Language Assosciation) 7th edition. You should use MLA as your guide for constructing bibliographies and in-text citations.
Remember, the use of a consistent format helps to 1) clearly document and authenticate your sources, and 2) helps the reader to locate materials that you you used in your research.
Below is a link to a Quick MLA Guide that provides you the most common citation formats and a more complete Guide to familiarize yourself with MLA.