ลาภประเสริฐ โ. THE DEVELOPMENT OF AN ACADEMIC LEADERSHIP MODEL FOR SCHOOL ADMINISTRATORS IN EDUCATIONAL OPPORTUNITY EXPANSION SCHOOLS LOWER NORTH-EASTERN REGION 1. ptujournal [internet]. 2026 Jun. 27 [cited 2026 Sep. 11];18(1):62-76. available from: https://so05.tci-thaijo.org/index.php/ptujournal/article/view/288024