APA (7th ed.) Citation

United States. Environmental Protection Agency. Office of Water. (2000). Wastewater technology fact sheet: Trickling filters. United States Environmental Protection Agency, Office of Water.

Chicago Style (17th ed.) Citation

United States. Environmental Protection Agency. Office of Water. Wastewater Technology Fact Sheet: Trickling Filters. [Washington, D.C.]: United States Environmental Protection Agency, Office of Water, 2000.

MLA (9th ed.) Citation

United States. Environmental Protection Agency. Office of Water. Wastewater Technology Fact Sheet: Trickling Filters. United States Environmental Protection Agency, Office of Water, 2000.