Srisodsaluk, P., B. Chitpakdee, and S. Chanseang. “Innovation for the Care of Older Persons in Thailand during the Thailand 4.0 Era”. UBRU Journal for Public Health Research, vol. 9, no. 2, Dec. 2020, pp. 47-54, https://he02.tci-thaijo.org/index.php/ubruphjou/article/view/245041.