Liemsuwan, Tienkaew, Pongpan Traimongkolkul, Sireerat Chetsumon, and Supaporn Songpracha. 2015. “Elderly Clustering and Welfare Needs Assessment in Khok Khinon Sub-District, Panthong District, Chon Buri Province”. Kasetsart Journal of Social Sciences 36 (1):16-33. https://so04.tci-thaijo.org/index.php/kjss/article/view/243101.