Letcher, T. M. (2014). Future energy: Improved, sustainable and clean options for our planet (Second edition.). Elsevier.
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Dyfyniad Arddull Chicago
Letcher, T. M. Future Energy: Improved, Sustainable and Clean Options for Our Planet. Second edition. Amsterdam: Elsevier, 2014.
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Dyfyniad MLA
Letcher, T. M. Future Energy: Improved, Sustainable and Clean Options for Our Planet. Second edition. Elsevier, 2014.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.