C. Kamalashiran, K. Sriyakul, S. Kietinun, P. Tungsukruthai, and P. Phetkate, “A Study on the Elederly’s Behavior on Self-Health Care with Thai Traditional Medicine in Four Regions of Thailand”, J Health Sci Thai, vol. 29, no. 1, pp. 36–47, Feb. 2020.