มหาหิงค์ สาคร. “The School Curriculum Administration under Khon Kaen Primary Educational Service Area Office 4”. Liberal Arts Review 12, no. 23 (June 30, 2017): 1–12. Accessed May 18, 2024. https://so04.tci-thaijo.org/index.php/larhcu/article/view/143974.