APA citiranje

Thomson South-Western. (2007). Virtual tutor system: Michigan version 3.0. Thomson South-Western.

Trích dẫn kiểu Chicago

Thomson South-Western. Virtual Tutor System: Michigan Version 3.0. Thomson South-Western, 2007.

MLA citiranje

Thomson South-Western. Virtual Tutor System: Michigan Version 3.0. Thomson South-Western, 2007.

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