National Service Center for Environmental Publications NSCEP / U.S. Environmental Protection Agency EPA. Onsite Wastewater Treatment Systems Manual.
Chicago-Zitierstil (17. Ausg.)National Service Center for Environmental Publications NSCEP / U.S. Environmental Protection Agency EPA. Onsite Wastewater Treatment Systems Manual.
MLA-Zitierstil (9. Ausg.)National Service Center for Environmental Publications NSCEP / U.S. Environmental Protection Agency EPA. Onsite Wastewater Treatment Systems Manual.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.