Mandaty, F. A.; Syaifudin, A.; Sumarno, S. The Relationship Between Progressive Muscle Relaxation Therapy and Blood Pressure in Elderly People Suffering from Hypertension: Fhandy Aldy Mandaty, Achmad Syaifudin, Sumarno. J. Persada Husada Indones. 2024, 11, 9-15.