American Water Works Association & ebrary, Inc. (2000). Principles of water rates, fees, and charges (5th ed.). American Water Works Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAmerican Water Works Association और Inc ebrary. Principles of Water Rates, Fees, and Charges. 5th ed. Denver, Colo.: American Water Works Association, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAmerican Water Works Association और Inc ebrary. Principles of Water Rates, Fees, and Charges. 5th ed. American Water Works Association, 2000.
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