APA
Crump David, Gressman Eugene, . (2012). Cases and materials on constitutional law. London: Lexis Nexis.
Chicago
Crump David, Gressman Eugene, . 2012. Cases and materials on constitutional law. London: Lexis Nexis.
Harvard
Crump David, Gressman Eugene, . (2012). Cases and materials on constitutional law. London: Lexis Nexis.
MLA
Crump David, Gressman Eugene, . Cases and materials on constitutional law. London: Lexis Nexis. 2012.