Não informado. (1990). Research Journal of the Water Pollution Control Federation. Water Pollution Control Federation.
Chicago-Zitierstil (17. Ausg.)Não informado. Research Journal of the Water Pollution Control Federation. Alexandria, Va: Water Pollution Control Federation, 1990.
MLA-Zitierstil (8. Ausg.)Não informado. Research Journal of the Water Pollution Control Federation. Water Pollution Control Federation, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.