1. American Educational Research Association, American Psychological Association, & National Council on Measurement in Education. (1999). Standards for educational and psychological testing. Washington, DC: American Educational Research Association.
2. Greenspan, A. (2000). The Evolving Demand for Skills. National Skills Summit. Washington, DC: U.S. Department of Labor.
3. Cognitive ability, cognitive aptitudes, job knowledge, and job performance
4. Lubinski, D. & Dawis, R. V. (1992). Aptitudes, skills and proficiencies. In M. D. Dunnette & L. M. Hough (Eds.), Handbook of I/O psychology (Vol. 3, 1-59). Palo Alto, CA: Consulting Psychologists Press.
5. Marshall, R. (2000). Remarks by Ray Marshall. National Skills Summit. Washington, DC: U.S. Department of Labor.