TY  - BOOK
AU  - Stallings, William.
TI  - Network security essentials: applications and standards 
SN  - 9788131761755
AV  - 23287-23291 
U1  - 005.8 22
PY  - 2011///
CY  - New Delhi
PB  - Pearson Education
N1  - Includes index
ER  -