Rueanphibun , A. (2022) “GUIDELINES FOR THE MANAGING LEARNING ENVIRONMENT OF DISTRICT SERVICE UNITS, UTTARADIT SPECIAL EDUCATION CENTER”, Journal of MCU Nakhondhat. Nakhon Si Thammarat, Thailand, 9(8), pp. 146–161. available at: https://so03.tci-thaijo.org/index.php/JMND/article/view/263276 (accessed: 11 September 2026).