Não informado. (2004). Sewage and Industrial Wastes. Federation of Sewage Works Associations.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Sewage and Industrial Wastes. Champaign, Ill: Federation of Sewage Works Associations, 2004.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Sewage and Industrial Wastes. Federation of Sewage Works Associations, 2004.
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