Nuprain P, Yotharak M, Samakkhi P. THE DEVELOPMENT OF AN OPERATIONS MANUAL INFORMATION SYSTEM FOR STUDENT AFFAIRS ADMINISTRATIVE ENCOURAGEMENT IN KOHSAMUI SCHOOL UNDER THE SECONDARY EDUCATIONAL SERVICE AREA OFFICE SURATTHANI CHUMPHON. Education MCU [internet]. 2025 Aug. 30 [cited 2025 Dec. 10];12(2):411-22. available from: https://so02.tci-thaijo.org/index.php/EDMCU/article/view/278053