Suangga, F. ., and N. . Ramadina. “THE EFFECT OF BACK MASSAGE THERAPY ON BACK PAIN IN THE ELDERLY AT BATU AJI PUSKESMAS BATAM”. Journal of Hospital Administration and Management (JHAM), vol. 2, no. 1, June 2021, pp. 39-44, https://journal.univawalbros.ac.id/index.php/jham/article/view/130.