Gaya APA
Sofyan, F. (2019).
Conversation and Correspondence in Business English (Cet. 5).
Jakarta:
Pustaka Tarbiyah Baru.
Gaya MLA
Sofyan, Fahmi.
"Conversation and Correspondence in Business English".
Cet. 5
Jakarta:
Pustaka Tarbiyah Baru,
2019.
Text.