Cofnodi Dyfyniadau
Dyfyniad APA
ebrary, Inc, & Maddaus, W. O. (2007). Water resources planning (2nd ed.). American Water Works Association.
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Dyfyniad Arddull Chicago
ebrary, Inc, and William O. Maddaus. Water Resources Planning. 2nd ed. Denver, Colo.: American Water Works Association, 2007.
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Dyfyniad MLA
ebrary, Inc, and William O. Maddaus. Water Resources Planning. 2nd ed. American Water Works Association, 2007.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.