“PERANCANGAN PROTOTIPE EARLY WARNING SYSTEMBERBIAYA MURAH UNTUK PERLINTASAN SEBIDANG TANPA PENJAGAAN”, VRJ, vol. 1, no. 03, pp. 918–927, Oct. 2024, Accessed: Aug. 28, 2025. [Online]. Available: https://variablejournal.my.id/index.php/VRJ/article/view/129