Silitonga, Immanuel DB., and Desri Ondira Purba. “PENGEMBANGAN BAHAN AJAR DIMASA PENDEMI COVID 19”. Pendidikan Bahasa Indonesia dan Sastra (Pendistra) 3, no. 1 (July 1, 2020): 16–20. Accessed December 4, 2024. https://ejournal.ust.ac.id/index.php/PENDISTRA/article/view/772.