Não informado. (1992). Water Environment Research. Water Environment Federation.
Chicago-Zitierstil (17. Ausg.)Não informado. Water Environment Research. Alexandria, Va: Water Environment Federation, 1992.
MLA-Zitierstil (8. Ausg.)Não informado. Water Environment Research. Water Environment Federation, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.