TY  - BOOK
AU  - Deitel, Harvey M.,
AU  - Deitel, Paul J.,
AU  - Choffnes, David R.,1
TI  - Operating system
SN  - 9788131712894
U1  - 001.6425 
PY  - 2013///
CY  - New Delhi
PB  - Pearson
ER  -