Siti Chotidjah. “ANALISIS PEMBUATAN AERODROME OBSTACLE CHART ICAO TYPE A DI SUB DIREKTORAT INFORMASI AERONAUTIKA JAKARTA”. Langit Biru: Jurnal Ilmiah Aviasi 4, no. 10 (March 3, 2020): 51-60. Accessed May 17, 2024. https://journal.ppicurug.ac.id/index.php/jurnal-ilmiah-aviasi/article/view/320.