Herdianto, Liga Bayu. “EVALUATION OF THE E-LEARNING SYSTEM OF PT. OTAK KANAN THROUGH BLACKBOX TESTING AND SYSTEM USABILITY SCALE (SUS)”. Jurnal Informatika dan Teknik Elektro Terapan 11, no. 3 (August 1, 2023). Accessed September 24, 2025. https://journal.eng.unila.ac.id/index.php/jitet/article/view/3065.