(2017). Oil information 2017. IEA Publications.
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Dyfyniad Arddull Chicago
Oil Information 2017. [Place of publication not identified]: IEA Publications, 2017.
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Dyfyniad MLA
Oil Information 2017. IEA Publications, 2017.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.