Idris, D.N.T. and Astarani, K. 2019. Therapy of Effective Progressive Muscle Relaxation to Reduce Insomnia in Elderly. STRADA : Jurnal Ilmiah Kesehatan. 8, 2 (Nov. 2019), 165–171. DOI:https://doi.org/10.30994/sjik.v8i2.219.