Setya Rini, Puji. “Progressive Muscle Relaxation As a Non-Pharmacological Intervention for Stress, Anxiety, and Quality of Life Among Elderly: A Systematic Review”. Journal of health research and technology 4, no. 1 (December 22, 2025): 73–84. Accessed February 27, 2026. https://e-journal.saku.co.id/index.php/JHRT/article/view/434.