Gaya APA

Sofyan, F. (2017). Conversation and Correspondence in Business English (Cet. 1). Jakarta: Penerbit Pustaka Tarbiyah Baru.

Gaya MLA

Sofyan, Fahmi. "Conversation and Correspondence in Business English". Cet. 1 Jakarta: Penerbit Pustaka Tarbiyah Baru, 2017. Text.