Kusuma, Candra, dan Charless. “Evaluasi Penggunaan E-Learning Universitas Universal Mobile Dengan Metode Goal Directed Design”. Journal of Digital Ecosystem for Natural Sustainability 2, no. 1 (Juni 20, 2022): 1–7. Diakses November 14, 2024. https://journal.uvers.ac.id/index.php/jodens/article/view/50.