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 
PY  - 2015///
CY  - New Delhi
PB  - Pearson
KW  -  Social sciences Statistical methods -- Computer programs ; SPSS for Windows
ER  -