APA ציטוט

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.

ציטוט MLA

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