TY  - BOOK
AU  - George, Darren
AU  - Mallery, Paul
TI  - SPSS for window step by step: A simple guide and reference. 17.0 update
SN  - 9788131762257
U1  - 519.502  GEO-S 
PY  - 2013///
CY  - Delhi
PB  - Pearson
ER  -