Chanaphai, Chaiyaphum, Waraporn U-sub, Wannee Thongraya, and Monchuda Supornjak. 2023. “ Uttaradit Province”. Journal of Humanities and Social Sciences Uttaradit Rajabhat University 10 (2):1-13. https://so04.tci-thaijo.org/index.php/johuru/article/view/269702.