Muhammad Abdillah Syam, et al. “Utilization of Geographic Information Systems for Natural Disaster Mitigation: A Literature Study With a Focus on the City of Medan”. Journal of Information Technology, Computer Science and Electrical Engineering, vol. 1, no. 3, Oct. 2024, pp. 491-0, http://ysmk.org/ejournal/index.php/jitcse/article/view/146.