APA (7 वां संस्करण) प्रशस्ति पत्र
Bloetscher, F. (2011). Utility management for water and wastewater operators. American Water Works Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Bloetscher, Frederick. Utility Management for Water and Wastewater Operators. Denver, Colo.: American Water Works Association, 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Bloetscher, Frederick. Utility Management for Water and Wastewater Operators. American Water Works Association, 2011.
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