Saragih, Jopinus, et al. “PERANCANGAN APLIKASI E-LEARNING BERBASIS WEB”. Seminar Nasional Bidang Kesehatan, Ekonomi, Pendidikan Dan Kemasyarakatan (SINAS TAMPAN), vol. 2, no. 1, June 2020, pp. 1-18, https://proceeding.unefaconference.org/index.php/TAMPAN/article/view/45.