Yothikarn, Wilasinee. “The Activities Reinforcing Value and Happiness of the Elderly in Elderly Schools”. Journal of Social Synergy 11, no. 2 (August 28, 2020): 37–53. Accessed May 6, 2024. https://so04.tci-thaijo.org/index.php/thaijss/article/view/244396.