Van, L. K., T. A. Dang, D. B. T. Pham, T. T. N. Vo, and V. P. H. Pham. “The Effectiveness of Using Technology in Learning English”. AsiaCALL Online Journal, vol. 12, no. 2, Feb. 2021, pp. 24-40, https://asiacall.info/acoj/index.php/journal/article/view/26.