Sapa, S., Supawan, S. and Boonwatthanakul, C. (2020) “A Model for Organizing Recreational Activities to Develop Adaptability of the Elderly in Mueang District, Udon Thani Province”, STOU Education Journal, 13(2), pp. 145–156. available at: https://so05.tci-thaijo.org/index.php/edjour_stou/article/view/173766 (accessed: 15 September 2026).