United States. Environmental Protection Agency. Office of Research and Development & United States. Environmental Protection Agency. Office of Wetlands, Oceans, and Watersheds. (1993). Created and natural wetlands for controlling nonpoint source pollution. C.K. Smoley.
Citazione stile Chigago Style (17a edizione)United States. Environmental Protection Agency. Office of Research and Development e Oceans United States. Environmental Protection Agency. Office of Wetlands. Created and Natural Wetlands for Controlling Nonpoint Source Pollution. Boca Raton, FL: C.K. Smoley, 1993.
Citatione MLA (9a ed.)United States. Environmental Protection Agency. Office of Research and Development e Oceans United States. Environmental Protection Agency. Office of Wetlands. Created and Natural Wetlands for Controlling Nonpoint Source Pollution. C.K. Smoley, 1993.