TY  - BOOK
AU  - Burns, David...[et al.]. 
AU  - Adesina, Odunayo.
AU  - Barker, Keith. 
TI  - Offical cert guide: CCNP security IPS 642-627 
U1  - 005.8076 22
PY  - 2012///
CY  - New Delhi
PB  - Pearson Education
ER  -