Thungsakul, N., and D. Nilsakul. “Place Attachment in an Old Commercial District: A Case Study in Ubon Ratchathani, Thailand”. Kasetsart Journal of Social Sciences, vol. 41, no. 1, Dec. 2019, pp. 169–175, https://so04.tci-thaijo.org/index.php/kjss/article/view/231611.