Dyfyniad APA

Preppernau, J., & Cox, J. (2010). Windows 7 Step by Step. Microsoft Press ; PHI Learning Pvt. Ltd..

Dyfyniad Arddull Chicago

Preppernau, Joan, and Joyce Cox. Windows 7 Step by Step. Redmond, Wash. : New Delhi: Microsoft Press ; PHI Learning Pvt. Ltd., 2010.

Dyfyniad MLA

Preppernau, Joan, and Joyce Cox. Windows 7 Step by Step. Microsoft Press ; PHI Learning Pvt. Ltd., 2010.

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