APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.