“Metode Location Based Service Dalam Mengurangi Resiko Tersesat Saat Pendakian Gunung Menggunakan Global Positioning System (GPS)”. Journal of Informatic and Information Security 1, no. 1 (May 29, 2020): 27–40. Accessed December 22, 2024. https://ejurnal.ubharajaya.ac.id/index.php/jiforty/article/view/138.