Sinaga, A. 2022. The Effect of Primigravida Mother’s Perineal Massage on Perineal Rupture in Tutun Sehati Pratama Clinic, Tanjung Morawa District Deli Serdang Year 2021. Science Midwifery. 10, 4 (Oct. 2022), 3348–3351. DOI:https://doi.org/10.35335/midwifery.v10i4.811.