Duong, Tam, and Suksan Suppasetseree. “The Effects of an Artificial Intelligence Voice Chatbot on Improving Vietnamese Undergraduate Students’ English Speaking Skills”. International Journal of Learning, Teaching and Educational Research 23, no. 3 (March 30, 2024): 293–321. Accessed June 8, 2026. http://ijlter.net/index.php/ijlter/article/view/1896.