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Dyfyniad Arddull ChicagoStarr, Cecie. Biology: Concepts and Applications. 5th ed. Belmont, CA: Brooks/Cole-Thomson Learning, 2003.
Dyfyniad MLAStarr, Cecie. Biology: Concepts and Applications. 5th ed. Brooks/Cole-Thomson Learning, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.