Nurdiansah A, Brada C, Firgi M, Salim SH, Nuraeni E. Optimalisasi Sistem Pembelajaran di Masa Pandemi Covid-19. Proceedings [Internet]. 2021Nov.4 [cited 2024Nov.22];1(6):172-9. Available from: https://proceedings.uinsgd.ac.id/index.php/proceedings/article/view/670