Saptono, Saptono, and Tiarto Tiarto. “Berbagai Halangan Masuk Pada Bisnis Penerbangan Berjadwal Di Indonesia”. Langit Biru: Jurnal Ilmiah Aviasi 9, no. 18 (October 25, 2014): 13–27. Accessed May 9, 2026. https://jurnal.overthinkingku.com/index.php/jurnal-ilmiah-aviasi/article/view/625.