ละม้ายศรีธิดาภรณ์, เพ็งสวัสดิ์วาโร, and กิติศรีวรพันธุ์พิศุทธิ์. “The Development of Training Curriculum to Enhance the Competency of the Administrative Officer School under The Buengkan Primary Educational Service Area”. Journal of Roi Et Rajabhat University 13, no. 1 (April 29, 2019): 218-225. Accessed June 25, 2019. https://www.tci-thaijo.org/index.php/reru/article/view/186053.