APA-viite

Gray, O. S. (1973). Cases and materials on environmental law (2nd ed.). The Bureau of National Affairs.

Chicago-tyylinen lähdeviittaus

Gray, Oscar S. Cases and Materials on Environmental Law. 2nd ed. Washington: The Bureau of National Affairs, 1973.

MLA-viite

Gray, Oscar S. Cases and Materials on Environmental Law. 2nd ed. The Bureau of National Affairs, 1973.