Beral, V., & Reeves, G. (1993). Childbearing, oral contraceptive use, and breast cancer.
芝加哥风格引文Beral, V., 与 G. Reeves. Childbearing, Oral Contraceptive Use, and Breast Cancer. 1993.
MLA引文Beral, V., 与 G. Reeves. Childbearing, Oral Contraceptive Use, and Breast Cancer. 1993.
警告：这些引文格式不一定是100％准确.