1. American Congress of Rehabilitation Medicine. (1993). Definition of mild traumatic brain injury. The Journal of Head Trauma Rehabilitation, 8, 86–87.
2. American Educational Research Association (AERA), American Psychological Association (APA), & National Council on Measurement in Education. (1999). Standards for Educational and Psychological Testing. Washington, DC: Author.
3. American Medical Association (1993). Guides to the evaluation of permanent impairment (4th edition). Chicago, IL: Author.
4. American Medical Association (2000). Guides to the evaluation of permanent impairment (5th edition). Chicago, IL: Author.
5. American Medical Association (2008). Guides to the evaluation of permanent impairment (6th edition). Chicago, IL: Author.