Utomo, Prabowo Budi, Dona Wahyudi, dan M Mujiono. “Pengembangan Sistem Informasi Presensi Berbasis Global Positioning Systems Dan Location-Based Service”. Jurnal Informatika Terpadu 11, no. 1 (Maret 30, 2025): 20–28. Diakses April 4, 2025. https://journal.nurulfikri.ac.id/index.php/JIT/article/view/1563.