Simatupang, Aidil Akbar, and Alfian Maulana. “Design of a Mobile-Based Attendance System Integrated With Android-Based Geolocator”. JITCoS : Journal of Information Technology and Computer System, vol. 1, no. 1, June 2025, pp. 33-45, https://ejournal.multimediatekno.org/index.php/jitcos/article/view/11.