APA引文

Duckworth, M. (1992). First Class: English for Tourism : Workbook. Hong Kong: Oxford University.

Trích dẫn kiểu Chicago

Duckworth, Michael. First Class: English for Tourism : Workbook. Hong Kong: Oxford University, 1992.

MLA引文

Duckworth, Michael. First Class: English for Tourism : Workbook. Hong Kong: Oxford University, 1992.

警告：这些引文格式不一定是100％准确.