एपीए उद्धरण

Koenig, C. L., Oxenden, C., & Jane Hudson. (2013). American English file: Workbook. Oxford: Oxford University Press.

शिकागो स्टाइल उद्धरण

Koenig, Chistina Latham, Clive Oxenden, और Jane Hudson. American English File: Workbook. Oxford: Oxford University Press, 2013.

एमएलए उद्धरण

Koenig, Chistina Latham, Clive Oxenden, और Jane Hudson. American English File: Workbook. Oxford: Oxford University Press, 2013.