Não informado. (1881). Proceedings of the American Water Works Association. American Water Works Association.
Chicago-Zitierstil (17. Ausg.)Não informado. Proceedings of the American Water Works Association. Denver, Colo: American Water Works Association, 1881.
MLA-Zitierstil (8. Ausg.)Não informado. Proceedings of the American Water Works Association. American Water Works Association, 1881.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.