APA Citation

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

Trích dẫn kiểu Chicago

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

MLA Citation

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

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