Kroobaa kanchit. THE RELATIONSHIP BETWEEN THE LEADERSHIP OF ADMINISTRATORS AND GUIDELINE FOR EDUCATIONAL QUALITY ASSURANCE UNDER SCHOOL OF CHIANGRAI PRIMARY EDUCATIONAL SERVICE AREA OFFICE 2. ptujournal [internet]. 2021 Jun. 30 [cited 2026 Sep. 28];13(1):72-86. available from: https://so05.tci-thaijo.org/index.php/ptujournal/article/view/249032