Rides, Sujatmiko. “The Effects of Cooperative Learning Teaching Strategies on The Speaking Confidence and Attitudes”. ELT-Lectura 4, no. 2 (February 20, 2018): 51-59. Accessed April 28, 2024. https://journal.unilak.ac.id/index.php/ELT-Lectura/article/view/2059.