Toonchaiyaphum, Matchuree. “A Proposed Policy for Social Innovation of Small - Sized School Under The Secondary Education Service Area Office 25”. Journal of Education Khon Kaen University (Graduate Studies Research) 13, no. 3-4 (December 30, 2019): 29–38. Accessed May 3, 2024. https://so02.tci-thaijo.org/index.php/EDGKKUJ/article/view/242952.