Siregar, Eva Novelia, and T. Silvana Sinar. “The Structure of English Classroom Discourse in SMP Negeri 1 Tebing Tinggi”. LINGUISTIK TERAPAN 13, no. 1 (April 29, 2016). Accessed July 5, 2025. https://jurnal.unimed.ac.id/2012/index.php/LTBI/article/view/4924.