“EFFECTIVENESS OF BACK ENDORPHIN MASSAGE AGAINST DECREASED DYSMENORRHEA IN STUDENTS OF THE FACULTY OF NURSING, UNIVERSITAS SUMATERA UTARA”. Al Insyirah International Scientific Conference on Health 3, no. 1 (April 14, 2023): 218–224. Accessed July 22, 2026. https://jurnal.ikta.ac.id/aisch/article/view/2389.