Sapa, Somchai, Sareepan Supawan, and Chanoknart Boonwatthanakul. 2020. “A Model for Organizing Recreational Activities to Develop Adaptability of the Elderly in Mueang District, Udon Thani Province”. STOU Education Journal 13 (2):145-56. https://so05.tci-thaijo.org/index.php/edjour_stou/article/view/173766.