Aczel, A. D. (1999). Complete business statistics (4th ed.). Boston: Irwin McGraw-Hill.

Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Hillsdale, NJ: Erlbaum.

Conover, W. J. (1999). Practical nonparametric statistics (3rd ed.). New York: John Wiley.

Hair, J. E., Anderson, R. E., Tatham, R. L., & Black, W. C. (1998). Multivariate data analysis. Upper Saddle River, NJ: Prentice-Hall.

Hocking, R. R. (1996). Methods and applications of linear models: Regression and the analysis of variance. New York: Wiley.

Kachigan, S. K. (1986). Statistical analysis: An interdisciplinary introduction to univariate & multivariate methods. New York: Radius Press.

Kish, L. (1987). Statistical design for research. New York: Wiley.

Lehmann, E. L., & D'Abrera, H. J. M. (1998). Nonparametrics: Statistical methods based on ranks (rev.). Upper Saddle River, NJ: Prentice-Hall.

Mendenhall, W., & Sincich, T. (1996). A second course in statistics: Regression analysis (5th ed.). Upper Saddle River, NJ: Prentice-Hall.

Murphy, Kevin R., & Myors, B. (1998). Statistical power analysis. Mahwah, NJ: Erlbaum.

Rowntree, D. (1981). Statistics without tears: A primer for non-mathematicians. New York: Charles Scribner & Sons.

Sharma, S. (1996). Applied multivariate techniques. New York: John Wiley.

Tabachnick, B. G., & Fidell, L. S. (2001). Computer-assisted research design and analysis. Needham Heights, MA: Allyn & Bacon.

Tabachnick, B. G., & Fidell, L. S. (2001). Using multivariate statistics (4th ed.). NY: HarperCollins.

Tabachnick, B. G., & Fidell, L. S. (2001). Using multivariate statistics, SPSS for Windows (4th ed.). New York: Allyn & Bacon.

Tufte, E. R (1990). Envisioning information. Cheshire. CT: Graphics Press.

Tufte, E. R. (2001). The visual display of quantitative information (2nd ed.). Cheshire, CT: Graphics Press.

Winer, B. J., Brown, D. R., & Michels, K. M (1991). Statistical principles in experimental design (3rd ed.). New York: McGraw-Hill.