Wongsirasawat, C., Pupat, P., & Sirimai, K. (2021). Effectiveness of school operations with international standards affiliated with Office Secondary Education Area, Region 4. RMUTSB ACADEMIC JOURNAL (HUMANITIES AND SOCIAL SCIENCES), 6(2), 228–237. Retrieved from https://so05.tci-thaijo.org/index.php/rmutsb-hs/article/view/250417