Tso, H.-C., and G. S. .-M. Chwo. “Online Proficiency Testing and Intensive Course Improvement of English Instruction at a Technology University in Taiwan”. Interdisciplinary Research Review, vol. 14, no. 2, May 2019, pp. 8-15, https://ph02.tci-thaijo.org/index.php/jtir/article/view/189713.