APA (7th ed.) Zitazioa

American Water Works Association & ebrary, Inc. (2002). Safety practices for water utilities (6th ed.). American Water Works Association.

Chicago Style (17th ed.) Zitazioa

American Water Works Association eta Inc ebrary. Safety Practices for Water Utilities. 6th ed. Denver, CO: American Water Works Association, 2002.

MLA (9th ed.) Zitazioa

American Water Works Association eta Inc ebrary. Safety Practices for Water Utilities. 6th ed. American Water Works Association, 2002.