Anastasi, A., & Urbina, S. (1997). Psychological testing. Englewood Cliffs, NJ: Prentice Hall.
2.
Bracken, B. A. (1987). Limitations of preschool instruments and standards for minimal levels of technical adequacy. Journal of Psychoeducational Assessment, 4, 313-326.
3.
Bracken, B. A., & McCallum, R. S. (1998). Universal Nonverbal Intelligence Test: Examiner's manual. Itasca, IL: Riverside Publishing.
4.
Chalfant, J. C., & Scheffelin, M. A. (1969). Central processing dysfunctions in children: A review of the research (Contract PH-43-67-61). Bethesda, MD: Department of Health, Education and Welfare.
5.
Sattler, J. M. (2001). Assessment of children: Cognitive applications (4th ed.). San Diego, CA: Jerome M. Sattler.
6.
Zeitschel, K., Kalisch, R., & Colarusso, R. (1979). Visual perception tests used with physically handicapped children. Academic Therapy, 14, 565-576.