Não informado. (2004). Sewage and Industrial Wastes. Federation of Sewage Works Associations.
Chicago-Zitierstil (17. Ausg.)Não informado. Sewage and Industrial Wastes. Champaign, Ill: Federation of Sewage Works Associations, 2004.
MLA-Zitierstil (8. Ausg.)Não informado. Sewage and Industrial Wastes. Federation of Sewage Works Associations, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.