Ginley, J. F., & Humphrey, T. A. (2009). Operational guide to AWWA standard G400: Utility management system. American Water Works Association.
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Dyfyniad Arddull Chicago
Ginley, James F., and Todd A. Humphrey. Operational Guide to AWWA Standard G400: Utility Management System. Denver: American Water Works Association, 2009.
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Dyfyniad MLA
Ginley, James F., and Todd A. Humphrey. Operational Guide to AWWA Standard G400: Utility Management System. American Water Works Association, 2009.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.