Jackson, W. (1979). Man and the environment (3rd ed.). WCB.
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Dyfyniad Arddull Chicago
Jackson, Wes. Man and the Environment. 3rd ed. Dubuque: WCB, 1979.
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Dyfyniad MLA
Jackson, Wes. Man and the Environment. 3rd ed. WCB, 1979.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.