Gude, K. (2001). Matrix: Upper - Intermediate Workbook. Oxford: Oxford Univ. Press.
Trích dẫn kiểu ChicagoGude, Kathy. Matrix: Upper - Intermediate Workbook. Oxford: Oxford Univ. Press, 2001.
Deismireacht MLAGude, Kathy. Matrix: Upper - Intermediate Workbook. Oxford: Oxford Univ. Press, 2001.
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