Nasution, Helmi wardah. “Relationship of Knowledge With Breastfeeding Mother’s Attitude About Oxytosin Massage On The Smoothness Ofreast Milk Elisabet Purba New Midwife Clinic South Panyabungan District Year 2021”. Science Midwifery 10, no. 1, October (September 3, 2021): 71–77. Accessed June 1, 2026. https://www.midwifery.iocspublisher.org/index.php/midwifery/article/view/142.