Cofnodi Dyfyniadau
Dyfyniad APA
Gehometria da natureza do eco.
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Dyfyniad Arddull Chicago
Gehometria Da Natureza Do Eco.
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Dyfyniad MLA
Gehometria Da Natureza Do Eco.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.