TY  - BOOK
AU  - George, Darren
AU  - Mallery, Paul
TI  - SPSS for windows step by step : a simple guide and reference 15.0 update
SN  - 9788131724293
U1  - 005.437 22
PY  - 2008///
CY  - Delhi
PB  - Pearson Education
ER  -