Silitonga, Tumpal, R. Widya Setiabudi Sumadinata, Arfin Sudirman, and Taufik Hidayat. “Civil Aviation Safety Evaluation Based on the Principle of International Civic Aviation Organization (ICAO): The Case of Indonesia”. International journal of health sciences 6, no. S4 (July 25, 2022): 10188–10210. Accessed November 4, 2024. https://sciencescholar.us/journal/index.php/ijhs/article/view/11037.