Munthum, Sawitree, and Laddawan Petchroj. “The Administration of Educational Opportunity Expansion School under the Office of Nonthaburi Primary Educational Service Area”. Journal of Humanities and Social Sciences, Rajapruk University 7, no. 3 (December 25, 2021): 225–239. Accessed May 14, 2024. https://so03.tci-thaijo.org/index.php/rpu/article/view/257352.