Use of etonogestrel implant beyond approved duration: prolonged contraceptive effectiveness.

MLA

Ribeiro, Bárbara C., et al. “Use of Etonogestrel Implant beyond Approved Duration: Prolonged Contraceptive Effectiveness.” The European Journal of Contraception & Reproductive Health Care : The Official Journal of the European Society of Contraception, vol. 23, no. 4, Aug. 2018, pp. 309–10. EBSCOhost, https://doi.org/10.1080/13625187.2018.1501799.

APA

Ribeiro, B. C., Nogueira-Silva, C., Afonso, H., Silva, P. O., & Reis, I. D. (2018). Use of etonogestrel implant beyond approved duration: prolonged contraceptive effectiveness. The European Journal of Contraception & Reproductive Health Care : The Official Journal of the European Society of Contraception, 23(4), 309–310. https://doi.org/10.1080/13625187.2018.1501799

Chicago

Ribeiro, Bárbara C, Cristina Nogueira-Silva, Hermínia Afonso, Pedro O Silva, and Isabel D Reis. 2018. “Use of Etonogestrel Implant beyond Approved Duration: Prolonged Contraceptive Effectiveness.” The European Journal of Contraception & Reproductive Health Care : The Official Journal of the European Society of Contraception 23 (4): 309–10. doi:10.1080/13625187.2018.1501799.