ชรารัตน์ อุบลรัตน์, and น้อยสมบัติ หทัย. 2017. “THE RELATIONSHIP BETWEEN SCHOOL PRINCIPALS COMPETENCY AND THE EFFECTIVENESS OF SCHOOLS UNDER THE OFFICE OF ROI-ET PRIMARY EDUCATIONAL SERVICE AREA 3”. Journal of Roi Et Rajabhat University 11 (2):173-82. https://so03.tci-thaijo.org/index.php/reru/article/view/176361.