Chimtragoon, Chalermwit. “The Relationship Between the Leadership Skills in the 21st Century of School Administrators and the Internal Quality Assurance Process of Private School, Chiangrai Province”. Rajapark Journal 18, no. 56 (February 29, 2024): 264–277. Accessed May 17, 2024. https://so05.tci-thaijo.org/index.php/RJPJ/article/view/267101.