Time since childbirth and prognosis in primary breast cancer: Population based study.

MLA

Kroman, Niels, and Jan Wohlfahrt. “Time since Childbirth and Prognosis in Primary Breast Cancer: Population Based Study.” BMJ: British Medical Journal (International Edition), vol. 315, no. 7112, Oct. 1997, pp. 851–55. EBSCOhost, https://doi.org/10.1136/bmj.315.7112.851.

APA

Kroman, N., & Wohlfahrt, J. (1997). Time since childbirth and prognosis in primary breast cancer: Population based study. BMJ: British Medical Journal (International Edition), 315(7112), 851–855. https://doi.org/10.1136/bmj.315.7112.851

Chicago

Kroman, Niels, and Jan Wohlfahrt. 1997. “Time since Childbirth and Prognosis in Primary Breast Cancer: Population Based Study.” BMJ: British Medical Journal (International Edition) 315 (7112): 851–55. doi:10.1136/bmj.315.7112.851.