APA citiranje

Tonya Trappe, G. T. (2009). Intelligent business coursebook upper intermadiate.

Trích dẫn kiểu Chicago

Tonya Trappe, Graham Tullis. Intelligent Business Coursebook Upper Intermadiate. 2009.

MLA citiranje

Tonya Trappe, Graham Tullis. Intelligent Business Coursebook Upper Intermadiate. 2009.

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