4. Statistical References
Crocker, L. and Algina, J. (1986), Introduction to Classical and Modern Test Theory, Fort Worth, TX: Harcourt Brace Javanovich College Publishers.
Ferguson, G. A. (1971), Statistical Analysis in Psychology and Education, New York NY: McGraw-Hill.
Sax, G. (1974), Principles of Educational Measurement and Evaluation, Belmont, CA: Wadsworth.

