Khoiruman, Muhamad Alfi, and Adib Ahmada. “Online Learning Problems; Students’ English Learning Barriers”. Darussalam English Journal (DEJ) 1, no. 1 (June 15, 2021): 51–59. Accessed April 26, 2026. https://ejournal.iaida.ac.id/index.php/dej/article/view/1037.