Ehrlich, P. R. (1968). The population bomb. Ballantine Books.
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Dyfyniad Arddull Chicago
Ehrlich, Paul R. The Population Bomb. New York: Ballantine Books, 1968.
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Dyfyniad MLA
Ehrlich, Paul R. The Population Bomb. Ballantine Books, 1968.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.