Bracken, B. A. (1987). Limitations of pre-school instruments and standards for minimal levels of technical adequacy. Journal of Psychoeducational Assessment, 5, 313-326.
2.
Bracken, B. A., & McCallum, S. (1998). Universal Nonverbal Intelligence Test. Chicago: Riverside.
3.
Brown, L., Sherbenou, R. J., & Johnsen, S. K. (1990). Test of Nonverbal Intelligence-Second Edition. Austin: PRO-ED.
4.
Brown, L., Sherbenou, R. J., & Johnsen, S. K. (1997). Test of Nonverbal Intelligence-Third Edition. Austin: PRO-ED.
5.
Dunn, L. M., & Dunn, L. M. (1981). Peabody Picture Vocabulary Test-Revised. Circle Pines, MN: American Guidance Service.
6.
Elliot, C. D. (1990). Differential Ability Scales: Introductory and technical manual. San Antonio, TX: The Psychological Corporation.
7.
MacEachron, A. E. (1982). Basic statistics in the human sciences. Austin, TX: PRO-ED.
8.
Schumacker, R. E., & Lomax, R. G. (1996). A beginner's guide to structural equation modeling. Mahwah, NJ: Erlbaum.
9.
Wechsler, D. (1981). Wechsler Adult Intelligence Scale-Revised. San Antonio: The Psychological Corporation.
10.
Wechsler, D. (1991). Wechsler Intelligence Scale for Children-Third Edition. San Antonio: The Psychological Corporation.