TY  - BOOK
AU  - Zenger, John H.
AU  - Joseph R . Folkman 
TI  - The Extraordinary Leader: Turning good Managers into Great Leaders 
SN  - 9780071628082
U1  - 658.4092 
PY  - 2009///
CY  - New York
PB  - Mc Graw Hill , 
KW  - Leadership
KW  - Leadership Development
ER  -