1. Hair, J.F., Black, W.C., Babin, B.J. and Anderson, R.E. (2019) Multivariate Data Analysis. 8th Edition, Pearson, Upper Saddle River.
2. Costello, A.B. and Osborne, J.W. (2005) Best Practices in Exploratory Factor Analysis: Four Recommendations for Getting the Most from Your Analysis. Practical Assessment, Research & Evaluation, 10, 1-9.
3. Evaluating the use of exploratory factor analysis in psychological research.
4. Exploratory factor analysis: A five-step guide for novices
5. Field, A.P. (2018) Discovering Statistics Using IBM SPSS Statistics. 5th Edition, Sage, Newbury Park.