"Unlike many APA Style references, you don’t need to know the author’s name to write a basic reference for court decisions. This blog post discusses what you do need to know."
Nonspecialists can use MLA style to cite legal sources in one of two ways: strict adherence to the MLA format template or a hybrid method incorporating the standard legal citation into the works-cited-list entry. In either case, titles of legal works should be standardized in your prose and list of works cited according to the guidelines on this site.
This open source material from Cornell's Legal Information Institute (LII) covers the rational as well as providing examples of citations from common types of legal publications.