Su, Ai Anh Thu, Thi Xuan Tu Cao, Do Lam Vy Le, Le Ngoc Trinh Nguyen, and Thi Lan Anh Nguyen. “Improving English Speaking Ability Through E-Learning”. AsiaCALL Online Journal 12, no. 2 (February 6, 2021): 58-71. Accessed April 16, 2021. https://asiacall.info/acoj/index.php/journal/article/view/29.