Trappe, T. (2005). Intelligent Business: Coursebook. Intermediate Business English. Pearson Education Limited.
Chicago Stili AlıntıTrappe, Tonya. Intelligent Business: Coursebook. Intermediate Business English. Pearson Education Limited, 2005.
MLA AlıntıTrappe, Tonya. Intelligent Business: Coursebook. Intermediate Business English. Pearson Education Limited, 2005.
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