Idris, Desi Natalia Trijayanti, and Kili Astarani. “Therapy of Effective Progressive Muscle Relaxation to Reduce Insomnia in Elderly”. STRADA : Jurnal Ilmiah Kesehatan 8, no. 2 (November 20, 2019): 165–171. Accessed September 15, 2025. https://sjik.org/index.php/sjik/article/view/219.