To cite legal documents, MLA say to consult The Chicago Manual of Style which refers to The Bluebook: A Uniform System of Citation (Harvard Law Review Association). Names of cases are italicized in the text, but not in bibliographic references.
Refer to The Chicago Manual of Style for guidelines to cite legal materials and laws. Public laws are collected in the annual publication of the United States Statutes at Large (Stat.).
The following examples follow the format given in The Chicago Manual of Style:
However, MLA Handbook, 8th edition (105) suggests this format. Either format is correct.