Cita APA

Beaber, E. F., Buist, D. S., Barlow, W. E., Malone, K. E., Reed, S. D., & Li, C. I. (2014). Recent oral contraceptive use by formulation and breast cancer risk among women 20–49 years of age.

Chicago Style Citation

Beaber, Elisabeth F., Diana S.M Buist, William E. Barlow, Kathleen E. Malone, Susan D. Reed, i Christopher I. Li. Recent Oral Contraceptive Use By Formulation and Breast Cancer Risk Among Women 20–49 Years of Age. 2014.

Cita MLA

Beaber, Elisabeth F., et al. Recent Oral Contraceptive Use By Formulation and Breast Cancer Risk Among Women 20–49 Years of Age. 2014.