Faisal, Muhammad. “Design an Attendance System Using Global Positioning System (GPS) Technology at PT. Cipta Anugrah Musi”. Jurnal Pengembangan Sistem Informasi dan Informatika 2, no. 2 (November 23, 2021): 104-124. Accessed October 8, 2026. https://www.journal.jis-institute.org/index.php/jpsii/article/view/558.