TY  - BOOK
AU  - George, Darren.
AU  - Mallery, Paul,
TI  -  SPSS for Windows step by step: a simple guide and reference, 17. 0 update 
SN  - 9780205755615
U1  - 005.55 22
PY  - 2010///
CY  - Boston
PB  - Allyn & Bacon
N1  - Includes bibliographical references and index
ER  -