Turnbull, N., W. Chada, W. Chuppawa, S. Seedaket, S. Chanaboon, B. Sangswai, S. Chaichanwattana, and N. Tangpratchayakun. “Health Status and Factors Associated with Self-Care among Older Adults”. Nursing Journal of The Ministry of Public Health, vol. 30, no. 3, Dec. 2020, pp. 35-49, https://he02.tci-thaijo.org/index.php/tnaph/article/view/248460.