Penprom, Pian, Watcharin Sutthisai, and Somkiet Kiet Cha-reon. 2020. “The Developing Model of the Elderly’s Quality of Life Policy: Surin Province Case Study”. Journal of Politics and Governance 10 (3). Mahasarahham, Thailand:139-54. https://so03.tci-thaijo.org/index.php/jopag/article/view/248544.