Oxford business English : grammar and practice.

MLA

Duckworth, Michael. Oxford Business English : Grammar and Practice. 4th ed. Oxford: University Press, 1999.

APA

Duckworth, M. (1999). Oxford business English : grammar and practice. 4th ed. Oxford: University Press.

Chicago

Duckworth, Michael, Oxford Business English: Grammar and Practice. 4th ed. Oxford: University Press, 1999.