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