Cofnodi Dyfyniadau
Dyfyniad APA
(2012). Oil information 2012: With 2011 data. International Energy Agency.
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Dyfyniad Arddull Chicago
Oil Information 2012: With 2011 Data. Paris, France: International Energy Agency, 2012.
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Dyfyniad MLA
Oil Information 2012: With 2011 Data. International Energy Agency, 2012.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.