Beral, V., & Reeves, G. (1993). Childbearing, oral contraceptive use, and breast cancer.
Dyfyniad Arddull ChicagoBeral, V., and G. Reeves. Childbearing, Oral Contraceptive Use, and Breast Cancer. 1993.
Dyfyniad MLABeral, V., and G. Reeves. Childbearing, Oral Contraceptive Use, and Breast Cancer. 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.