N. I. Halil, “The Effectiveness of Using Edmodo as an Online Learning Platform in Covid-19”, J. Penelit. dan. Pengkaj. Ilmu. Pendidik. e-Saintika, vol. 4, no. 3, pp. 284–298, Nov. 2020, doi: 10.36312/e-saintika.v4i3.316.