ไชยพรมประชาชาติ, นันทะศรีวันเพ็ญ, and เพ็งสวัสดิ์วาโร. 2019. “Development of Training Curriculum to Enhance Problem-Solving Skills of Bannontae School Students under Sakon Nakhon Primary Educational Service Area Office 3”. Journal of Roi Et Rajabhat University 13 (1), 69-78. https://www.tci-thaijo.org/index.php/reru/article/view/185965.