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Dyfyniad Arddull ChicagoPage, Ernest W., Claude Alvin Villee, and Dorothy B. Villee. Human Reproduction: The Core Content of Obstetrics, Gynecology, and Perinatal Medicine. Philadelphia: Saunders, 1976.
Dyfyniad MLAPage, Ernest W., et al. Human Reproduction: The Core Content of Obstetrics, Gynecology, and Perinatal Medicine. Saunders, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.