APA (7th ed.) Citation

CS, M., & K, N. (2012). Hormonal contraception and HIV: An unanswered question. Lancet Infectious Diseases, 12(1), 2. https://doi.org/10.1016/s1473-3099(11)70254-7

Chicago Style (17th ed.) Citation

CS, Morrison, and Nanda K. "Hormonal Contraception and HIV: An Unanswered Question." Lancet Infectious Diseases 12, no. 1 (2012): 2. https://doi.org/10.1016/s1473-3099(11)70254-7.

MLA (9th ed.) Citation

CS, Morrison, and Nanda K. "Hormonal Contraception and HIV: An Unanswered Question." Lancet Infectious Diseases, vol. 12, no. 1, 2012, p. 2, https://doi.org/10.1016/s1473-3099(11)70254-7.