Suparjan, Suparjan. “Mobile Communication Device in English Language Learning: Motives and Constraints”. Journal of ELT Research: The Academic Journal of Studies in English Language Teaching and Learning 5, no. 1 (June 9, 2020): 53–67. Accessed December 22, 2024. https://journal.uhamka.ac.id/index.php/jer/article/view/4105.