“Application of Endorphin, Oxytocin, and Sugestive (Speos) Massage Stimulation Method to Increase Breast Milk” (2025) JPK : Jurnal Proteksi Kesehatan, 14(2), pp. 112–118. Available at: https://jurnal.pkr.ac.id/index.php/JPK/article/view/1071 (Accessed: 25 May 2026).