1
Field, Andy. Discovering statistics using IBM SPSS statistics: (and sex and drugs and rock ‘n’ roll). 4th ed. Los Angeles: Sage 2013.
2
Howell, David C. Fundamental statistics for the behavioral sciences. 7th ed. Belmont, CA: Wadsworth Cengage Learning 2011.
3
J. Baron. Decisions about the future. Thinking and deciding. Cambridge: Cambridge University Press, 2008 2008.