Toonchaiyaphum, Matchuree. 2019. “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 (3-4):29-38. https://so02.tci-thaijo.org/index.php/EDGKKUJ/article/view/242952.