Cofnodi Dyfyniadau
Dyfyniad APA
(19). [Planta da cidade do] Porto. s.n.
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Dyfyniad Arddull Chicago
[Planta Da Cidade Do] Porto. s.n, 19.
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Dyfyniad MLA
[Planta Da Cidade Do] Porto. s.n, 19.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.