APA (7th ed.) Citation

American Water Works Association. (1951). Water quality and treatment: A manual (2nd ed.). The Association.

Chicago Style (17th ed.) Citation

American Water Works Association. Water Quality and Treatment: A Manual. 2nd ed. New York: The Association, 1951.

MLA (8th ed.) Citation

American Water Works Association. Water Quality and Treatment: A Manual. 2nd ed. The Association, 1951.