United States. Environmental Protection Agency. (2002). Onsite wastewater treatment and disposal systems and onsite wastewater treatment systems manual. U.S. Environmental Protection Agency.
Citazione stile Chigago Style (17a edizione)United States. Environmental Protection Agency. Onsite Wastewater Treatment and Disposal Systems and Onsite Wastewater Treatment Systems Manual. Cincinnati: U.S. Environmental Protection Agency, 2002.
Citatione MLA (9a ed.)United States. Environmental Protection Agency. Onsite Wastewater Treatment and Disposal Systems and Onsite Wastewater Treatment Systems Manual. U.S. Environmental Protection Agency, 2002.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.