ฤทธิ์สกุลชัย สุจิตรตรา. “Thai Special Economic Zone and Economic Border : Case Study of Wan Yai District, Mukdahan Province”. Chophayom Journal 30, no. 2 (October 29, 2019): 69–78. Accessed May 5, 2024. https://so01.tci-thaijo.org/index.php/ejChophayom/article/view/208052.