APA-viite

Pi, R., Liu, Y., Zhao, X., Liu, P., & Qi, X. (2020). Tubal infertility and pelvic adhesion increase risk of heterotopic pregnancy after in vitro fertilization: A retrospective study. Medicine (Baltimore).

Chicago-tyylinen lähdeviittaus

Pi, Ruyu, Yu Liu, Xia Zhao, Ping Liu, ja Xiaorong Qi. "Tubal Infertility and Pelvic Adhesion Increase Risk of Heterotopic Pregnancy After in Vitro Fertilization: A Retrospective Study." Medicine (Baltimore) 2020.

MLA-viite

Pi, Ruyu, et al. "Tubal Infertility and Pelvic Adhesion Increase Risk of Heterotopic Pregnancy After in Vitro Fertilization: A Retrospective Study." Medicine (Baltimore) 2020.

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