TY  - BOOK
AU  -  Marzano, Robert J
AU  - Frontier, Tony.
AU  - Livingston, David.
TI  - Effective Supervision:  Supporting the Art and Science of Teaching 
SN  - 9781416611554
AV  - LB2838 .M3768 
PY  - 2011///
CY  - Alexandria, Virginia USA
PB  - ASCD
KW  - School supervision
KW  - Teachers
KW  -  In-service training
KW  - Performance standards
ER  -