Cheewatragoongit, A. (2013) “DISTANCE EDUCATION SERVICES IN SUKHOTHAI THAMMATHIRAT OPEN UNIVERSITY (STOU) AND KOREA NATIONAL OPEN UNIVERSITY (KNOU)”, Modern Management Frontier Journal, 9(1), pp. 1–8. available at: https://so04.tci-thaijo.org/index.php/stou-sms-pr/article/view/11871 (accessed: 24 September 2026).