สุวรรละโพลง แ., บูรณะชาติ ส., and กันมา น. “Factors Affecting the Academic Administration of Private Secondary Schools in Chiangrai Province”. Trends of Humanities and Social Sciences Research, vol. 4, no. 3, June 2019, pp. 85-100, https://so03.tci-thaijo.org/index.php/Humanties-up/article/view/198850.