Idawati Situmorang, Rajainal Saragih, and Yumitra Falenthine Br Ginting. “The Effectiveness of English Learning Through Online Learning During the Covid-19 Pandemic”. International Journal of Educational Research Excellence (June 30, 2020): 32–38. Accessed February 10, 2026. https://ejournal.ipinternasional.com/index.php/ijere/article/view/158.