Preppernau, J., & Cox, J. (2010). Windows 7 step by step. PHI Learning.
Chicago Edition CitationPreppernau, Joan, and Joyce Cox. Windows 7 Step by Step. New Delhi: PHI Learning, 2010.
Deismireacht MLAPreppernau, Joan, and Joyce Cox. Windows 7 Step by Step. PHI Learning, 2010.
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