Nugraha, A. R., A. Sa’adi, and N. W. Tirthaningsih. “Profile Study of Ectopic Pregnancy at Department of Obstetrics and Gynecology, Dr. Soetomo Hospital, Surabaya, Indonesia”. Majalah Obstetri & Ginekologi, vol. 28, no. 2, Oct. 2020, pp. 75-78, doi:10.20473/mog.V28I22020.75-78.