Kurniawan, Heri. “Application of E-Learning for Online Learning During the Covid-19 Pandemic at University of Pembangunan Panca Budi”. Journal of Applied Engineering and Technological Science (JAETS) 4, no. 1 (September 1, 2022): 42–47. Accessed April 20, 2024. https://yrpipku.com/journal/index.php/jaets/article/view/973.