Robert. (2020). Implementasi GPS (Global Positioning System Tracking And ) Monitoring, Pengenal Wajah, Pengenal Sidik Jari Pada Sistem Presensi Karyawan Berbasis Mobile : Array. Jurnal Ilmiah Komputasi, 19(2), 203–216. https://doi.org/10.32409/jikstik.19.2.88