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Dyfyniad Arddull ChicagoReece, Jane B., and Neil A. Campbell. Campbell Biology: Jane B. Reece ... [et Al.]. 9th ed. Boston: Benjamin Cummings/Pearson, 2011.
Dyfyniad MLAReece, Jane B., and Neil A. Campbell. Campbell Biology: Jane B. Reece ... [et Al.]. 9th ed. Benjamin Cummings/Pearson, 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.