ธรรมยาฤทธิ์ ธรรมรัตน์, and บดีรัฐ โชติ. “Political Awareness Situation of Residents in Udon Thani Municipality”. Local Administration Journal 11, no. 2 (June 20, 2018): 55–71. Accessed May 7, 2024. https://so04.tci-thaijo.org/index.php/colakkujournals/article/view/130486.