THE EFFECT OF OXYTOCIN MASSAGE ON THE SMOOTHNESS OF BREAST MILK IN POSTPARTUM MOTHERS IN THE WORK AREA OF THE LUMUT HEALTH CARE CENTRAL TAPANULI DISTRICT IN 2021. JIA. 2022;13(2). Accessed January 10, 2026. https://jurnal.polkesri.ac.id/index.php/JIA/article/view/387