Wicaksono, Rachmad. “Students’ Perception and Writing Competence towards the Use of Google Classroom in Learning Writing”. RETAIN : Journal of Research in English Language Teaching 9, no. 1 (February 18, 2021): 80-88. Accessed May 6, 2024. https://ejournal.unesa.ac.id/index.php/retain/article/view/37412.