Chaikhan, S., J. Tippila, P. Limpiteeprakan, L. Boonkhao, and P. Thani. “Development of a Learning Center for an Aging Society in Bungwai Sub-District, Ubon Ratchathani Province”. Area Based Development Research Journal, vol. 14, no. 3, Sept. 2022, pp. 173-89, https://so01.tci-thaijo.org/index.php/abcjournal/article/view/256151.