BENNY KURNIANTO. FAKTOR-FAKTOR BERPENGARUH DALAM TOEFL® PREPARATION STUDI KASUS PROGRAM STUDI DIPLOMA IV TEKNIK LISTRIK BANDARA ANGKATAN-17. Langit Biru: Jurnal Ilmiah Aviasi, indonesia, v. 13, n. 02, p. 1–8, 2020. DOI: 10.54147/langitbiru.v13i02.242. Disponível em: https://jurnal.overthinkingku.com/index.php/jurnal-ilmiah-aviasi/article/view/DOI. Acesso em: 15 may. 2026.