Fratama, Mellan, and febriyanti panjaitan. “Pemanfaatan Web Service Moodle Berbasis Rest-Json Untuk Intensitas Pengguna E-Learning”. Jurnal Ilmiah Matrik 22, no. 3 (December 2, 2020): 310-315. Accessed March 7, 2021. http://journal.binadarma.ac.id/index.php/jurnalmatrik/article/view/1076.