Water Environment Federation. (2008). Operation of municipal wastewater treatment plants (6a. ed.). WEF Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWater Environment Federation. Operation of Municipal Wastewater Treatment Plants. 6a. ed. Nueva York: WEF Press, 2008.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWater Environment Federation. Operation of Municipal Wastewater Treatment Plants. 6a. ed. WEF Press, 2008.
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