APA (7th ed.) Citation

Chen, M. J., Pymar, H., & Creinin, M. D. (2018). Controversies in family planning: Persistently elevated serum human chorionic gonadotropin levels after aspiration abortion. Contraception, 98(6), 541. https://doi.org/10.1016/j.contraception.2018.07.136

Chicago Style (17th ed.) Citation

Chen, Melissa J., Helen Pymar, and Mitchell D. Creinin. "Controversies in Family Planning: Persistently Elevated Serum Human Chorionic Gonadotropin Levels After Aspiration Abortion." Contraception 98, no. 6 (2018): 541. https://doi.org/10.1016/j.contraception.2018.07.136.

MLA (9th ed.) Citation

Chen, Melissa J., et al. "Controversies in Family Planning: Persistently Elevated Serum Human Chorionic Gonadotropin Levels After Aspiration Abortion." Contraception, vol. 98, no. 6, 2018, p. 541, https://doi.org/10.1016/j.contraception.2018.07.136.