Harichai, Pichit, and Thanyaporn Nualsing. 2023. “COMPETENCIES OF SCHOOL PRINCIPALS AFFECTING TEACHING EFFICIENCY OF TEACHERS UNDER YASOTHON PRIMARY EDUCATION SERVICE AREA OFFICE 2”. Academic Journal of Mahamakut Buddhist University Roi Et Campus 12 (2):210-21. https://so01.tci-thaijo.org/index.php/AJMBU/article/view/270086.