TY  - BOOK
AU  - George, Darren
AU  - Mallery, Paul
TI  - SPSS for Windows step by step: a simple guide and reference = 18.0 update
SN  - 9789332518124
U1  - 005.55 GEO 
PY  - 2014///
CY  - Noida
PB  - Pearson
ER  -