“The Importance Increasing Attendance Efficiency Accuracy With Presence System in Era Industrial Revolution 4.0”. International Journal of Cyber and IT Service Management (IJCITSM) 4, no. 2 (October 16, 2024): 133–142. Accessed October 22, 2026. https://iiast.iaic-publisher.org/ijcitsm/IJCITSM/article/view/168.