Wongsirasawat, Chanchai, Phadungchai Pupat, and Kajohnsak Sirimai. “Effectiveness of School Operations With International Standards Affiliated With Office Secondary Education Area, Region 4”. RMUTSB ACADEMIC JOURNAL (HUMANITIES AND SOCIAL SCIENCES) 6, no. 2 (December 17, 2021): 228–237. Accessed April 29, 2024. https://so05.tci-thaijo.org/index.php/rmutsb-hs/article/view/250417.