Nurach คมกริช, and Worrachat พีระศักดิ์. “THE DEVELOPMENT OF GUIDELINES FOR ACADEMIC APERATIONAL IN SCHOOLS UNDER THE OFFICE OF SECONDARY EDUCATIONAL SERVICE AREA 33”. Journal of MCU Nakhondhat 7, no. 8 (August 27, 2020): 60–75. Accessed August 10, 2022. https://so03.tci-thaijo.org/index.php/JMND/article/view/246255.