Roberts, M. (1986). Biology: A functional approach (4th ed.). Thomas Nelson.
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Dyfyniad Arddull Chicago
Roberts, M.B.V. Biology: A Functional Approach. 4th ed. Walton: Thomas Nelson, 1986.
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Dyfyniad MLA
Roberts, M.B.V. Biology: A Functional Approach. 4th ed. Thomas Nelson, 1986.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.