Abercrombie, M., & Hickman, M. (1990). The new penguin dictionary of biology (8th ed.). Penguin books.
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Dyfyniad Arddull Chicago
Abercrombie, M., and M. Hickman. The New Penguin Dictionary of Biology. 8th ed. London: Penguin books, 1990.
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Dyfyniad MLA
Abercrombie, M., and M. Hickman. The New Penguin Dictionary of Biology. 8th ed. Penguin books, 1990.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.