Srimuang, T., C. Supucworakul, A. Choprapun, J. Potisaen, and T. Potisaen. “The effect of yoga on health development of the elderly in Amphoe Na Dun Mahasarakham”. Journal for Developing the Social and Community, vol. 8, no. 1, Apr. 2021, pp. 309-28, https://so03.tci-thaijo.org/index.php/rdirmu/article/view/241687.