APA aipamena

Preppernau, J., & Cox, J. (2010). Windows 7 step by step. PHI Learning.

Chicago Style aipamena

Preppernau, Joan, and Joyce Cox. Windows 7 Step by Step. New Delhi: PHI Learning, 2010.

MLA aipamena

Preppernau, Joan, and Joyce Cox. Windows 7 Step by Step. PHI Learning, 2010.