Ritsakulchai, Suchittra. “The Creation of Public Relations Materials to Promote Sustainable Tourism: A Case Study of Wanyai, Mukdahan”. Local Administration Journal 15, no. 2 (June 30, 2022): 163–184. Accessed May 2, 2024. https://so04.tci-thaijo.org/index.php/colakkujournals/article/view/258417.