ไชยพรม ท., เพ็งสวัสดิ์ ว. and ก่อบุญ บ. (2018) “The Development of Internal Control Operation Model in Schools under Sakon Nakhon Primary Educational Service Area Office 3”, Journal of Roi Et Rajabhat University, 12(1), pp. 107–117. available at: https://so03.tci-thaijo.org/index.php/reru/article/view/164824 (accessed: 8 October 2026).