NUGROHO BUDI R. MASALAH TRANSPORTASI MELALUI PENDEKATAN SISTEM. Langit Biru: Jurnal Ilmiah Aviasi, indonesia, v. 1, n. 1, p. 6–9, 2008. DOI: 10.54147/langitbiru.v1i1.96. Disponível em: https://jurnal.overthinkingku.com/index.php/jurnal-ilmiah-aviasi/article/view/96. Acesso em: 14 may. 2026.