Zulpikar, Z., and E. . Fatkhunnajah. “Student Satisfaction and Perception of Performance in the E-Learning Environment During the Covid-19 Pandemic in Higher Education”. International Conference On Economics Business Management And Accounting (ICOEMA), vol. 1, Aug. 2022, pp. 704-1, https://conference.untag-sby.ac.id/index.php/icoema/article/view/2201.