Nurwahidah, et al. “Effect of Diaphragmatic Breathing Exercise Leaflet on Reducing Blood Pressure of Hypertensive Elderly: An Integrated Health Care Delivery System”. International Journal of Psychosocial Rehabilitation, vol. 24, no. 6, Aug. 2020, pp. 1765-79, https://doi.org/10.61841/ne6nzq57.