Corson, S. L., & Derman Richard J., e. (1985). Fertility control. Little, Brown.
Dyfyniad Arddull ChicagoCorson, Stephen L., and ed Derman Richard J. Fertility Control. Little, Brown, 1985.
Dyfyniad MLACorson, Stephen L., and ed Derman Richard J. Fertility Control. Little, Brown, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.