Hutagaol, H. S., & Saragih, H. S. (2018). The Effect of Back Massage on Lower Back Pain in Intrapartum. Jurnal Ilmiah PANNMED (Pharmacist, Analyst, Nurse, Nutrition, Midwivery, Environment, Dentist), 11(3), 163–166. https://doi.org/10.36911/pannmed.v11i3.91