APA引文

Duckworth, M. (1992). First Class: English for Tourism : Workbook. New York: Oxford University Press.

Trích dẫn kiểu Chicago

Duckworth, Michael. First Class: English for Tourism : Workbook. New York: Oxford University Press, 1992.

MLA引文

Duckworth, Michael. First Class: English for Tourism : Workbook. New York: Oxford University Press, 1992.

警告：這些引文格式不一定是100％准確.