Cofnodi Dyfyniadau
Dyfyniad APA
Estados Unidos NASA. (1976). Viking pictures of Mars. NASA.
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Dyfyniad Arddull Chicago
Estados Unidos NASA. Viking Pictures of Mars. NASA, 1976.
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Dyfyniad MLA
Estados Unidos NASA. Viking Pictures of Mars. NASA, 1976.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.