Cita APA (7a ed.)

Wainwright, G. (1999). Tricky business letters. Universities Press.

Cita Chicago Style (17a ed.)

Wainwright, Gordon. Tricky Business Letters. Hyderabad: Universities Press, 1999.

Cita MLA (9a ed.)

Wainwright, Gordon. Tricky Business Letters. Universities Press, 1999.