1. Amado, A. J. (2003). Partitioning predicted variance into constituent parts: A primer on regression commonality analysis. Research in the Schools, 10, 91–97.
2. Courville, T., & Thompson, B. (2001). Use of structure coefficients in published multiple regression articles: β is not enough. Educational & Psychological Measurement, 61, 229–248.
3. Sage University Paper Series on Quantitative Applications in the Social Sciences, Series 07-079;J. Fox,1991
4. Holzinger, K. J., & Swineford, F. (1939). A study in factor analysis: The stability of a bi-factor solution (Supplementary Monographs No. 48, pp.81–911). Chicago: University of Chicago, Department of Education.
5. Hornik, K. (2007). The R FAQ. Retrieved April 14, 2007, from cran .r-project.org/doc/FAQ/.