Yai-in, A. “THE DEVELOPMENT OF ELDERLY’S WELFARE STRUCTURE IN THAI SOCIETY: CASE STUDY OF UMONG MUNICIPALITY MUEANG LAMPHUN DISTRICT, LAMPHUN PROVINCE”. Journal of MCU Social Science Review, vol. 10, no. 1, Mar. 2021, pp. 52-65, https://so03.tci-thaijo.org/index.php/jssr/article/view/249513.