APA (7th ed.) Citation

Gray, O. S. (1974). Cases and materials on environmental law. 1974 supplement (2d ed.). Bureau of National Affairs.

Chicago Style (17th ed.) Citation

Gray, Oscar S. Cases and Materials on Environmental Law. 1974 Supplement. 2d ed. Washington: Bureau of National Affairs, 1974.

MLA (9th ed.) Citation

Gray, Oscar S. Cases and Materials on Environmental Law. 1974 Supplement. 2d ed. Bureau of National Affairs, 1974.