एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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