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

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

SPSS 15 made simple 由 Kinnear, Paul R.

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

Table of contents only

Stata base reference manual release 10.

Stata longitudinal reference manual, release 10.