“LEVELS OF ONLINE LEARNING EFFECTIVENESS IN THE TIME OF THE COVID-19 PANDEMIC USING DIFFERENT APPLICATIONS LEARNING BY STUDENT’S PERCEPTION”, epsilon, vol. 3, no. 1, Apr. 2022, Accessed: Apr. 29, 2026. [Online]. Available: https://jurnal.stkippgribl.ac.id/index.php/epsilon/article/view/583