Environmental Council of the States (U.S.). Sludge Management Task Committee of the Environmental Council, Environmental and Water Resources Institute (U.S.), ebrary, Inc, & Tyagi, R. D. (2009). Sustainable sludge management: Production of value added products. American Society of Civil Engineers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Environmental Council of the States (U.S.). Sludge Management Task Committee of the Environmental Council, Environmental and Water Resources Institute (U.S.), Inc ebrary, και R. D. Tyagi. Sustainable Sludge Management: Production of Value Added Products. Reston, VA: American Society of Civil Engineers, 2009.
Παραπομπή σε μορφή MLA (9th εκδ.)Environmental Council of the States (U.S.). Sludge Management Task Committee of the Environmental Council, et al. Sustainable Sludge Management: Production of Value Added Products. American Society of Civil Engineers, 2009.