एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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