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Dyfyniad Arddull ChicagoThe Mortality of Abortion: Legal and Historical Perspectives. Cambridge: Havard University Press, 1972.
Dyfyniad MLAThe Mortality of Abortion: Legal and Historical Perspectives. Havard University Press, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.