Bumroong-Ayosakoon, T., Kosito, P., Somkhaoyai, T. and Chonrat, V. (2021) “GUIDELINES FOR INTERNAL EDUCATIONAL QUALITY ASSURANCE ACCORDING TO THE 4 IDDHIPADAS PRINCIPLE OF PRIVATE SCHOOLS FOR ORDINARY EDUCATION IN NAKHON SI THAMMARAT PROVINCE”, Journal of Graduate MCU KhonKaen Campus, 8(3), pp. 187–199. available at: https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/247234 (accessed: 7 October 2026).