Muangkasem, Benjamat. “The Model of Age-Friendly City in Ban Du Subdistrict, Muang District, Chiang Rai Province”. Journal of MCU Humanities Review 7, no. 1 (June 29, 2021): 239–254. Accessed May 8, 2024. https://so03.tci-thaijo.org/index.php/human/article/view/252735.