1. Nature versus nurture in the development of cognition in deaf people;Akamatsu,2000
2. Determining intelligence quotients of Nigerian deaf children with the Wechsler Intelligence Scale for Children, Revised;Alade;Early Child Development and Care,1992
3. Standards for educational and psychological testing;National Council on Measurement in Education,1999
4. Ethnical principles of psychologists and code of conduct,2002
5. Standardization of the WISC-R Performance Scale for deaf children;Anderson,1977