Citing Legal References APA Style - Purdue OWLMost legal materials are cited using Bluebook style, which is the standard legal citation style used in all disciplines (see Bluebook style in The Bluebook: A Uniform System of Citation, 2015). APA defers to Bluebook style for legal materials and uses those templates and patterns in bibliographies. This resource lists some of the common legal references APA users might need in their work, but it is not exhaustive. Please note, legal conventions may differ outside the US.