Ardini, Ni Wayan. “Questionnaire of Students’ Responses in Use Google Classroom: Validity and Reliability Tests”. International Journal of Language and Literature 5, no. 4 (June 8, 2023): 205–211. Accessed May 8, 2024. https://ejournal.undiksha.ac.id/index.php/IJLL/article/view/43708.