Cofnodi Dyfyniadau
Dyfyniad APA
(1810). [Textos sobre a classificação dos diamantes].
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Dyfyniad Arddull Chicago
[Textos Sobre a Classificação Dos Diamantes]. 1810.
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Dyfyniad MLA
[Textos Sobre a Classificação Dos Diamantes]. 1810.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.