APA引文

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引文

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

警告：这些引文格式不一定是100％准确.