Jeena, Y. “Piam Sook School : The Community Management Modelfor an Aging Society in the 21st Century, Chiang Mai Province”. Journal of Research and Development Institute Rajabhat Maha Sarakham University, vol. 5, no. 1, Dec. 2018, pp. 171-84, https://so03.tci-thaijo.org/index.php/rdirmu/article/view/210518.