ผิวแดงศ., วงษ์มณฑาเ., ณ ถลางช., & อันทะไชยส. (2019). The Development Strategic Tourism Business in Udonthani Province To Enhance Competitive Advantage. Journal of Roi Et Rajabhat University, 13(1), 195-205. Retrieved from https://www.tci-thaijo.org/index.php/reru/article/view/186045