Darwin, C., & Secord, J. A. (2008). Evolutionary writings. Oxford University Press.
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Dyfyniad Arddull Chicago
Darwin, Charles, and James A. Secord. Evolutionary Writings. Oxford ; New York: Oxford University Press, 2008.
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Dyfyniad MLA
Darwin, Charles, and James A. Secord. Evolutionary Writings. Oxford University Press, 2008.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.