Cita APA (7a ed.)

Kench, A. (1973). The language of English Business Letters (1st.). Macmillan Education Ltd.

Cita Chicago Style (17a ed.)

Kench, A. The Language of English Business Letters. 1st. London: Macmillan Education Ltd, 1973.

Cita MLA (9a ed.)

Kench, A. The Language of English Business Letters. 1st. Macmillan Education Ltd, 1973.