Andre Setya Yudhanto, Migunani. PEMANFAATAN GLOBAL POSITIONING SYSTEM (GPS) PADA PRESENSI KARYAWAN BERBASIS SMARTPHONE. ELKOM [Internet]. 2020Dec.10 [cited 2024Sep.19];13(2):139 -150. Available from: http://ujicoba.stekom.ac.id/index.php/elkom/article/view/307