Panfuekdee, K., W. Subruangthong, and M. Rattanasermpong. “The Suitable Welfare for The Elderly in Different Ages Case Study of Singburi Municipality”. Rajapark Journal, vol. 16, no. 47, Aug. 2022, pp. 254-72, https://so05.tci-thaijo.org/index.php/RJPJ/article/view/257810.