Nurach ค. . .; Worrachat พ. . THE DEVELOPMENT OF GUIDELINES FOR ACADEMIC APERATIONAL IN SCHOOLS UNDER THE OFFICE OF SECONDARY EDUCATIONAL SERVICE AREA 33. Journal of MCU Nakhondhat, Nakhon Si Thammarat, Thailand, v. 7, n. 8, p. 60–75, 2020. Disponível em: https://so03.tci-thaijo.org/index.php/JMND/article/view/246255. Acesso em: 10 aug. 2022.