Thain, S. and Mulkhien, S. (2024) “The development of 21st century teacher competencies in Yupparaj Wittayalai school, the secondary education area, Chiang Mai. ”, MCU Haripunchai Review, 8(1), pp. 206–219. Available at: https://so04.tci-thaijo.org/index.php/JMHR/article/view/a014 (Accessed: 19 May 2024).