TY  - BOOK
AU  - George, Darren
AU  - Mallery, Paul 
TI  - SPSS for windows step by step: a simple guide and reference 18.0 update
U1  - 005.55 GEO  
PY  - 2014///
CY  - New Delhi
PB  - Dorling Kindersley (India) pvt ltd
N1  - Includes bibliographical references and index 
ER  -