APA (7th ed.) Citation

American Water Works Association. (1990). Recommended practice for backflow prevention and cross-connection control (2nd ed.). American Water Works Association.

Chicago Style (17th ed.) Citation

American Water Works Association. Recommended Practice for Backflow Prevention and Cross-connection Control. 2nd ed. Denver, CO: American Water Works Association, 1990.

MLA (9th ed.) Citation

American Water Works Association. Recommended Practice for Backflow Prevention and Cross-connection Control. 2nd ed. American Water Works Association, 1990.