Cofnodi Dyfyniadau
Dyfyniad APA
(1987). Into the Unknown: The story of Exploration (ed.). National Geographical society.
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Dyfyniad Arddull Chicago
Into the Unknown: The Story of Exploration. ed. Washington: National Geographical society, 1987.
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Dyfyniad MLA
Into the Unknown: The Story of Exploration. ed. National Geographical society, 1987.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.