ธรรมสอน ธ., and ดอกไธสง บ. “THE POLITICAL LEADERSHIP OF MAYORS IN SUBDISTRICT MUNICIPALITY ADMINISTRATIONS IN THE AREA OF UPPER NORTHERN REGION”. RMUTT Global Business and Economics Review, vol. 10, no. 1, June 2015, pp. 171-90, https://so03.tci-thaijo.org/index.php/RMUTT-Gber/article/view/242040.