Davis, M. L. (2004). Principles of environmental engineering and science. New York, NY: McGraw-Hill.
शिकागो स्टाइल उद्धरणDavis, Mackenziel Leo. Principles of Environmental Engineering and Science. New York, NY: McGraw-Hill, 2004.
एमएलए उद्धरणDavis, Mackenziel Leo. Principles of Environmental Engineering and Science. New York, NY: McGraw-Hill, 2004.
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