National Research Council (U.S.) Committee on Water Quality Improvement for the Pittsburgh Region. (2005). Regional cooperation for water quality improvement in southwestern Pennsylvania. National Academies Press.
Chicago-Zitierstil (17. Ausg.)National Research Council (U.S.) Committee on Water Quality Improvement for the Pittsburgh Region. Regional Cooperation for Water Quality Improvement in Southwestern Pennsylvania. Washington, DC: National Academies Press, 2005.
MLA-Zitierstil (9. Ausg.)National Research Council (U.S.) Committee on Water Quality Improvement for the Pittsburgh Region. Regional Cooperation for Water Quality Improvement in Southwestern Pennsylvania. National Academies Press, 2005.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.