Hartono, Tri, Bintang Nandana Henry, Sirje Nurm, Lukita Pasha, and Dwi Julianingsih. 2024. “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 (2):133-42. https://doi.org/10.34306/ijcitsm.v4i2.168.