(2014). Safety management for utilities (Seventh edition.). American Water Works Association.
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Dyfyniad Arddull Chicago
Safety Management for Utilities. Seventh edition. Denver, Colorado: American Water Works Association, 2014.
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Dyfyniad MLA
Safety Management for Utilities. Seventh edition. American Water Works Association, 2014.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.