American Water Works Association & ebrary, Inc. (2000). Principles of water rates, fees, and charges (5th ed.). American Water Works Association.
Chicago-referens (17:e uppl.)American Water Works Association och Inc ebrary. Principles of Water Rates, Fees, and Charges. 5th ed. Denver, Colo.: American Water Works Association, 2000.
MLA-referens (9:e uppl.)American Water Works Association och Inc ebrary. Principles of Water Rates, Fees, and Charges. 5th ed. American Water Works Association, 2000.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.