Cita APA

Duckworth, M. (2008). Countdown to first certificate: (Workbook CD). Oxford: Oxford University Press.

Citación estilo Chicago

Duckworth, Michael. Countdown to First Certificate: (Workbook CD). Oxford: Oxford University Press, 2008.

Cita MLA

Duckworth, Michael. Countdown to First Certificate: (Workbook CD). Oxford: Oxford University Press, 2008.

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