The rise and fall of levonorgestrel implants: 1992-1996.

MLA

Berenson, A. B., et al. “The Rise and Fall of Levonorgestrel Implants: 1992-1996.” Obstetrics and Gynecology, vol. 92, no. 5, Nov. 1998, pp. 790–94. EBSCOhost, https://doi.org/10.1016/s0029-7844(98)00311-1.

APA

Berenson, A. B., Wiemann, C. M., McCombs, S. L., & Somma-Garcia, A. (1998). The rise and fall of levonorgestrel implants: 1992-1996. Obstetrics and Gynecology, 92(5), 790–794. https://doi.org/10.1016/s0029-7844(98)00311-1

Chicago

Berenson, A B, C M Wiemann, S L McCombs, and A Somma-Garcia. 1998. “The Rise and Fall of Levonorgestrel Implants: 1992-1996.” Obstetrics and Gynecology 92 (5): 790–94. doi:10.1016/s0029-7844(98)00311-1.