Helti Tanjung, Mestika Rija. “Relationship of Postpartum Mother’s Knowledge about Perineal Care With Belief in Healing Perineal Sutures in Lima Puluh Village, Lima Puluh Subdistrict, Batu Bara Regency in 2021”. Science Midwifery 10, no. 1, October (December 21, 2021): 410–416. Accessed May 1, 2026. https://midwifery.iocspublisher.org/index.php/midwifery/article/view/230.