Mulyani, Sri, Vismaia S. Damaianti, Yeti Mulyati, and Andoyo Sastromiharjo. “The Effectiveness of Opinion Gaps, Reasoning, and Information Tasks in Improving Speaking Skills”. International Journal of Learning, Teaching and Educational Research 22, no. 2 (February 28, 2023): 113–130. Accessed May 23, 2026. https://ijlter.net/index.php/ijlter/article/view/1521.