(1991). European centres of expertise in water and wastewater treatment technology: Directory of European activities (2. ed.). Metra Martech.
Chicago-Zitierstil (17. Ausg.)European Centres of Expertise in Water and Wastewater Treatment Technology: Directory of European Activities. 2. ed. London: Metra Martech, 1991.
MLA-Zitierstil (9. Ausg.)European Centres of Expertise in Water and Wastewater Treatment Technology: Directory of European Activities. 2. ed. Metra Martech, 1991.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.