Additional bibliography for study
1. Costello, A. B., & Osborne, J. W. (2005). Best practices in exploratory factor analysis: Four recommendations for getting the most from your analysis. Practical Assessment, Research & Evaluation, 10(7): 1-9.
2. Field, A. (2009). Discovering statistics using SPSS (and sex and drugs and rock 'n' roll). London, Thousand Oaks, New Delhi, Singapore: SAGE.
3. Leech, N. L., Barrett, K. C., & Morgan, G. A. (2005). SPSS for intermediate statistics: Use and interpretation (2nd Ed.). Mahwah, New Jersey, London: Lawrence Erlbaum Associates.
4. Morgan, G. A., Leech, N. L., Gloeckner, G. W., & Barrett, K. C. (2004). SPSS for introductory statistics. Use and interpretation (2nd Ed.). Mahwah, New Jersey, London: Lawrence Erlbaum Associates.
5. Pallant, J. (2001). SPSS survival manual: A step-by-step guide to data analysis using SPSS for Windows (Version 10). Crows Nest: Allen & Unwin.
6. Σειρά βίντεο εφαρμογής στατιστικών μεθόδων με τη χρήση του SPSS (http://www.how2stats.net/p/home.html).
7. Σειρά βίντεο SPSS από το London School of Economics (http://www.lse.ac.uk/methodology/tutorials/SPSS/home.aspx).
8. Βίντεο για τους βαθμούς ελευθερίας (http://creative-wisdom.com/pub/df/default.htm)