TY  - BOOK
AU  - George, Darren
AU  - Mallery, Paul 
TI  - IBM SPSS statistics 23 step by step: a simple guide and reference
SN  - 9780815366560 
U1  - 005.55 GEO  
PY  - 2016///
CY  - New York
PB  - Routledge
N1  - Includes bibliographical references and index 
ER  -