Gore, A. (1993). Earth in the Balance: Ecology and the human spirit. Penguin Books.
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Dyfyniad Arddull Chicago
Gore, Albert. Earth in the Balance: Ecology and the Human Spirit. New York: Penguin Books, 1993.
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Dyfyniad MLA
Gore, Albert. Earth in the Balance: Ecology and the Human Spirit. Penguin Books, 1993.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.