Gaya APA

Whitehead, G., Whitehead, D, H. (1989). Pitman Business Correspondence / Geoffrey Whitehead (Cet.1). Jakarta: Binarupa Aksara.

Gaya MLA

Whitehead, Geoffrey., Whitehead, David, H. "Pitman Business Correspondence / Geoffrey Whitehead". Cet.1 Jakarta: Binarupa Aksara, 1989. Text.