National Geographic Society. (2004). Africa (1a. ed.). National Geographic Society.
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Dyfyniad Arddull Chicago
National Geographic Society. Africa. 1a. ed. Buenos Aires: National Geographic Society, 2004.
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Dyfyniad MLA
National Geographic Society. Africa. 1a. ed. National Geographic Society, 2004.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.