Saroyo, Y. B. and Danarti, M. D. (2017) “Prediction of Vaginal Delivery Using Fetal Head Descent Assessed Using Transperineal Ultrasound: Penilaian Penurunan Kepala dengan USG Transperineal untuk Penentuan Keberhasilan Persalinan Pervaginam”, Indonesian Journal of Obstetrics and Gynecology, 5(3), pp. 149–153. doi: 10.32771/inajog.v5i3.541.