WITYA MEUARTA, BAGUS. “The Implementation of Group Discussion in Teaching Speaking to The Tenth Grade Students of SMA Negeri 4 Surabaya”. RETAIN : Journal of Research in English Language Teaching 1, no. 3 (August 16, 2013). Accessed May 19, 2024. https://ejournal.unesa.ac.id/index.php/retain/article/view/3851.