Water Environment Federation. (2008). Operation of municipal wastewater treatment plants (Sixth edition.). WEF Press McGraw Hill.
Chicago-viite (17. p.)Water Environment Federation. Operation of Municipal Wastewater Treatment Plants. Sixth edition. New York: WEF Press McGraw Hill, 2008.
MLA-viite (9. p.)Water Environment Federation. Operation of Municipal Wastewater Treatment Plants. Sixth edition. WEF Press McGraw Hill, 2008.
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