Contraceptive use at first intercourse is associated with subsequent sexual behaviors.

MLA

Guleria, Sonia, et al. “Contraceptive Use at First Intercourse Is Associated with Subsequent Sexual Behaviors.” Contraception, vol. 99, no. 4, Apr. 2019, pp. 217–21. EBSCOhost, https://doi.org/10.1016/j.contraception.2018.12.006.

APA

Guleria, S., Thomsen, L. T., Munk, C., Nygård, M., Hansen, B. T., Elfström, K. M., Arnheim-Dahlström, L., Liaw, K.-L., Frederiksen, K., & Kjær, S. K. (2019). Contraceptive use at first intercourse is associated with subsequent sexual behaviors. Contraception, 99(4), 217–221. https://doi.org/10.1016/j.contraception.2018.12.006

Chicago

Guleria, Sonia, Louise T Thomsen, Christian Munk, Mari Nygård, Bo T Hansen, K Miriam Elfström, Lisen Arnheim-Dahlström, Kai-Li Liaw, Kirsten Frederiksen, and Susanne K Kjær. 2019. “Contraceptive Use at First Intercourse Is Associated with Subsequent Sexual Behaviors.” Contraception 99 (4): 217–21. doi:10.1016/j.contraception.2018.12.006.