SPSS analysis without anguish : version 16 for Windows per Coakes, Sheridan J.

Statistical methods for practice and research a guide to data analysis using SPSS per Gaur, Ajai S. 1977-

SPSS 15 made simple per Kinnear, Paul R.

SPSS analysis without anguish : version 15.0 for Windows per Coakes, Sheridan J.

Stata user's guide release 10.

Stata quick reference and index release 10.

Stata graphics reference manual release 10.

SPSS for dummies per Griffith, Arthur

Table of contents only

Stata base reference manual release 10.

Stata longitudinal reference manual, release 10.