Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.