Kankhwao C, Charoenchue V. STRATEGIES TO DEVELOP SELF-DISCIPLINED STUDENT UNDER THE SECONDARY EDUCATIONAL SERVICE AREA OFFICE CHAIYAPHUM. JEI [internet]. 2024 May 29 [cited 2025 Mar. 31];26(2):93-105. available from: https://so06.tci-thaijo.org/index.php/edujournal_nu/article/view/264667