Παραπομπή σε μορφή APA (7η εκδ.)

National Research Council (U.S.). Committee on Water Quality Improvement for the Pittsburgh Region & ebrary, Inc. (2005). Regional cooperation for water quality improvement in southwestern Pennsylvania. National Academies Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

National Research Council (U.S.). Committee on Water Quality Improvement for the Pittsburgh Region και Inc ebrary. Regional Cooperation for Water Quality Improvement in Southwestern Pennsylvania. Washington, DC: National Academies Press, 2005.

Παραπομπή σε μορφή MLA (9th εκδ.)

National Research Council (U.S.). Committee on Water Quality Improvement for the Pittsburgh Region και Inc ebrary. Regional Cooperation for Water Quality Improvement in Southwestern Pennsylvania. National Academies Press, 2005.