Dyfyniad APA
Bloetscher, F. (2011). Utility management for water and wastewater operators. American Water Works Association.
Dyfyniad Arddull Chicago
Bloetscher, Frederick. Utility Management for Water and Wastewater Operators. Denver, Colo.: American Water Works Association, 2011.
Dyfyniad MLA
Bloetscher, Frederick. Utility Management for Water and Wastewater Operators. American Water Works Association, 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.