ขุนสิงห์สกุล ส., and วัชรธนพัฒน์ธาดา พ. “The Election Behavior of People in Phichit Province”. RMUTL Journal of Business Administration and Liberal Arts, vol. 6, no. 2, Dec. 2018, pp. 73-84, https://so05.tci-thaijo.org/index.php/balajhss/article/view/164137.