Cofnodi Dyfyniadau
Dyfyniad APA
(2006). Porto (3ª ed.). Turinta.
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Dyfyniad Arddull Chicago
Porto. 3ª ed. Turinta, 2006.
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Dyfyniad MLA
Porto. 3ª ed. Turinta, 2006.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.