Check with your instructor. Depending on the nature of your work, you may be asked to use APA style outlined in the Publication Manual of the American Psychological Association (6th ed.) or you may be asked to follow proper legal citation format outlined in The Bluebook: A Uniform System of Citation. This guide contains resources for both of these citation styles.
The citation generators listed below will construct a citation for you. They are not foolproof. Proofread the finished product carefully.