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

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

SPSS 15 made simple od Kinnear, Paul R.

SPSS analysis without anguish : version 15.0 for Windows od 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 od Griffith, Arthur

Table of contents only

Stata base reference manual release 10.

Stata longitudinal reference manual, release 10.