Quintana J. Jenny. (2007). Build up to Countdown. Workbook with Key. New York, Oxford University Press, 2007.
Citace podle Chicago (17th ed.)Quintana J. Jenny. Build Up to Countdown. Workbook with Key. New York, Oxford University Press, 2007, 2007.
Citace podle MLA (9th ed.)Quintana J. Jenny. Build Up to Countdown. Workbook with Key. New York, Oxford University Press, 2007, 2007.
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