Pirograd, P., and O. K. Keeratisiroj. “The Effects of a Self-Efficacy Application Program on Dental Health Care Behavior Among Older Adults in an Elderly Club, Lablae District, Uttaradit Province”. Thai Journal of Health Education, vol. 42, no. 2, Nov. 2019, pp. 110-22, https://he01.tci-thaijo.org/index.php/muhed/article/view/224504.