Cofnodi Dyfyniadau
Dyfyniad APA
Everest Editora. (1998). Expo'98 Lisboa. Everest.
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Dyfyniad Arddull Chicago
Everest Editora. Expo'98 Lisboa. Everest, 1998.
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Dyfyniad MLA
Everest Editora. Expo'98 Lisboa. Everest, 1998.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.