Cofnodi Dyfyniadau
Dyfyniad APA
Agenda 21: Environment. Ace Communication Ltd.
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Dyfyniad Arddull Chicago
Agenda 21: Environment. Nairobi,Kenya: Ace Communication Ltd.
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Dyfyniad MLA
Agenda 21: Environment. Ace Communication Ltd.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.