APA (7th ed.) Citation

United States. Environmental Protection Agency. Office of Water. (2007). Biological nutrient removal processes and costs. U.S. Environmental Protection Agency, Office of Water.

Chicago Style (17th ed.) Citation

United States. Environmental Protection Agency. Office of Water. Biological Nutrient Removal Processes and Costs. Washington, DC: U.S. Environmental Protection Agency, Office of Water, 2007.

MLA (9th ed.) Citation

United States. Environmental Protection Agency. Office of Water. Biological Nutrient Removal Processes and Costs. U.S. Environmental Protection Agency, Office of Water, 2007.