Knovel (Firm), Water Environment Federation. Activated Sludge Task Force, & Water Environment Federation. Municipal Subcommittee. (2002). Activated sludge (2nd ed.). Water Environment Federation.
Chicago Style (17th ed.) CitationKnovel (Firm), Water Environment Federation. Activated Sludge Task Force, and Water Environment Federation. Municipal Subcommittee. Activated Sludge. 2nd ed. Alexandria, VA: Water Environment Federation, 2002.
MLA (9th ed.) CitationKnovel (Firm), et al. Activated Sludge. 2nd ed. Water Environment Federation, 2002.
Warning: These citations may not always be 100% accurate.