APA (7th ed.) Citation

Simms, I., Rogers, P. A., & Nicoll, A. (1997). The influence of demographic change and cumulative risk of pelvic inflammatory disease on the incidence of ectopic pregnancy. Epidemiology & Infection, 119(1), 49. https://doi.org/10.1017/S0950268897007711

Chicago Style (17th ed.) Citation

Simms, I., P A. Rogers, and A. Nicoll. "The Influence of Demographic Change and Cumulative Risk of Pelvic Inflammatory Disease on the Incidence of Ectopic Pregnancy." Epidemiology & Infection 119, no. 1 (1997): 49. https://doi.org/10.1017/S0950268897007711.

MLA (9th ed.) Citation

Simms, I., et al. "The Influence of Demographic Change and Cumulative Risk of Pelvic Inflammatory Disease on the Incidence of Ectopic Pregnancy." Epidemiology & Infection, vol. 119, no. 1, 1997, p. 49, https://doi.org/10.1017/S0950268897007711.