Gray, N. F. (2005). Water technology: An introduction for environmental scientists and engineers. London,New York: Elsevier.
शिकागो स्टाइल उद्धरणGray, N. F. Water Technology: An Introduction for Environmental Scientists and Engineers. London,New York: Elsevier, 2005.
एमएलए उद्धरणGray, N. F. Water Technology: An Introduction for Environmental Scientists and Engineers. London,New York: Elsevier, 2005.
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