Gaya APA
Leo, Sutanto, Mentari, Ines. (2017).
English for professional airline services .
Jakarta:
PT Gramedia Pustaka Utama.
Gaya Chicago
Leo, Sutanto, Mentari, Ines.
English for professional airline services.
Jakarta:
PT Gramedia Pustaka Utama,
2017.
Text.
Gaya MLA
Leo, Sutanto, Mentari, Ines.
English for professional airline services.
Jakarta:
PT Gramedia Pustaka Utama,
2017.
Text.
Gaya Turabian
Leo, Sutanto, Mentari, Ines.
English for professional airline services.
Jakarta:
PT Gramedia Pustaka Utama,
2017.
Print.