Gaya APA
Sofyan, F. (2017).
Conversation and correspondence in business english (Cet. 2).
Jakarta:
Pustaka Tarbiyah Baru.
Gaya MLA
Sofyan, Fahmi.
"Conversation and correspondence in business english".
Cet. 2
Jakarta:
Pustaka Tarbiyah Baru,
2017.
Text.