Meeatman K, Lapcharoen S. SITUATIONAL LEADERSHIP OF SCHOOL ADMINISTRATORS AFFECTING SCHOOL EFFECTIVENESS IN SCHOOLS UNDER THE BANGKOK SECONDARY EDUCATIONAL SERVICE AREA OFFICE 2 . AJPU [internet]. 2026 Jun. 30 [cited 2026 Sep. 11];17(1):167-79. available from: https://so01.tci-thaijo.org/index.php/AJPU/article/view/285737