Nurach K, Worrachat P. THE DEVELOPMENT OF GUIDELINES FOR ACADEMIC APERATIONAL IN SCHOOLS UNDER THE OFFICE OF SECONDARY EDUCATIONAL SERVICE AREA 33. JMND [internet]. 2020 Aug. 27 [cited 2026 Sep. 11];7(8):60-75. available from: https://so03.tci-thaijo.org/index.php/JMND/article/view/246255