สินธุพันธ์ อ. “The Charismatic Leadership of the Mayor in the Municipal District Muang Udonthani Province”. Trends of Humanities and Social Sciences Research, vol. 6, no. 1, June 2019, pp. 42-59, https://so03.tci-thaijo.org/index.php/Humanties-up/article/view/196623.