Swadriokul, S., and N. . Bootnoi. “Factors Affect Effectiveness of Elderly Life Quality Development in Lampang Province”. Journal of Research and Development Institute Rajabhat Maha Sarakham University, vol. 7, no. 1, June 2020, pp. 13-24, https://so03.tci-thaijo.org/index.php/rdirmu/article/view/245034.