Buauan, A., & Tunkaew, S. (2023). Developing Administration Model for Quality Maintenance of Small Educational Opportunity Extension Schools in the Upper Northern Region. Journal of Multidisciplinary in Humanities and Social Sciences, 6(4), 1966–1987. retrieved from https://so04.tci-thaijo.org/index.php/jmhs1_s/article/view/264946