Marjones Hardy H. Sihombing, and Rimmar Siringoringo. “Sistem Informasi E-Learning Pada SMK Pariwisata Imelda Medan”. JITA (Journal of Information Technology and Accounting), Vol. 2, no. 1, Mar. 2021, pp. 18-28, https://jurnal.uimedan.ac.id/index.php/JITA/article/view/549.