Saraswati, Ni Putu Tiara, and Surya Tri Saputra. “Standarisasi Prosedur Koordinasi Antara Unit APP Dan Tower Dalam Menggunakan Sistem Freetext Di Perum LPPNPI Cabang Pontianak”. Aviation Business and Operations Journal 1, no. 02 (January 31, 2024): 57 - 62. Accessed May 16, 2024. https://journal.ppicurug.ac.id/index.php/aboj/article/view/820.