APA Citatie

Duckworth, M. (2009). Countdown to first certificate. Oxford: Oxford University Press.

Chicago Style citaat

Duckworth, Michael. Countdown to First Certificate. Oxford: Oxford University Press, 2009.

MLA citatie

Duckworth, Michael. Countdown to First Certificate. Oxford: Oxford University Press, 2009.

Let op: Deze citaties zijn niet altijd 100% accuraat.