1. Thornton, J. M., Browne, B., & Ramphul, M. (2020). Mechanisms and management of normal labour. Obstetrics, Gynaecology & Reproductive Medicine. doi:10.1016/j.ogrm.2019.12.002
2. Kementerian Kesehatan Indonesia. Buku saku Pelayanan Kesehatan Ibu di Fasilitas Kesehatan Dasar dan Rujukan. 2015.
3. Milton S.H. Normal Labor and Delivery. Medscape. 2019. https://emedicine.medscape.com/article/260036-overview#showall
4. Grabowska M.S., Ciszewska J., Godowska J.B., et all. Delivery in Myopic Women: A Comparison of Mode of Delivery in Years 1990, 2000, and 2010. 2019: 25: 7715–7719. doi: 10.12659/MSM.916479.
5. Zakerihamidi M. Roudsari RL. et al. Vaginal Delivery vs. Cesarean Section: A Focused Ethnographic Study of Women’s Perceptions in The North of Iran. International Journal Community Based. 2015 Jan; 3(1): 39–50.
6. Desai NM, Tsukerman A. Vaginal Delivery. Treasure Island (FL): StatPearls Publishing; 2022 Jan. https://www.ncbi.nlm.nih.gov/books/NBK559197/
7. Gittinger E. Normal Delivery of the Enfant. Medscape. 2019. https://emedicine.medscape.com/article/83021-overview#a3
8. Anderson-Bagga FM, Sze A. Placenta Previa. Treasure Island (FL): StatPearls Publishing; 2022 Jan. https://www.ncbi.nlm.nih.gov/books/NBK539818/
9. InformedHealth.org. Cologne, Germany: Institute for Quality and Efficiency in Health Care (IQWiG); 2006. Genital herpes in pregnancy. 2018 Jul. https://www.ncbi.nlm.nih.gov/books/NBK525779/
12. J Heard A. Multifetal Pregnancy Treatment & Management. Medscape. 2016. https://emedicine.medscape.com/article/1618038-treatment#d14