Cita APA

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

Chicago Edition Citation

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

Cita MLA

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