Cita APA

Spencer, J. D., Millis, R. R., & Hayward, J. L. (1978). Contraceptive steroids and breast cancer.

Chicago Style Citation

Spencer, J D., R R. Millis, i J L. Hayward. Contraceptive Steroids and Breast Cancer. 1978.

Cita MLA

Spencer, J D., R R. Millis, i J L. Hayward. Contraceptive Steroids and Breast Cancer. 1978.