Poonual, D., P. Sirasoonthorn, S. Phongphit, and S. Puanarunuthai. “A Development of Healthy Ageing City Model*”. Thai Journal of Health Education, vol. 37, no. 1, Feb. 2019, pp. 82-101, https://he01.tci-thaijo.org/index.php/muhed/article/view/174642.