Irawan, Erna, Nurul Iklima, M Maidartati, Tita Puspita Ningrum, and Yulia Safira. 2024. “The Effect of Progressive Muscle Relaxation Therapy on Sleep Quality in Elderly Hypertensive Patients”. Journal Medical Informatics Technology 2 (4):103-7. https://doi.org/10.37034/medinftech.v2i4.66.