Aiemphaya, K., N. Noymanee, A. Anukulwech, and D. Raso. “THE TEACHERS’ SPIRIT IN 21ST CENTURY”. Journal of Educational Review Faculty of Education in MCU, vol. 8, no. 2, Aug. 2021, pp. 398-09, https://so02.tci-thaijo.org/index.php/EDMCU/article/view/247005.