Bracken, B. A. (1987). Limitations of preschool assessment and standards for minimal levels of technical adequacy. Journal of Psychoeducational Assessment, 5, 313-326.
2.
Williams, K. T., & Wang, J. J. (1997). Technical references to the Peabody Picture Vocabulary Test-Third Edition (PPVT-III). Circle Pines, MN: American Guidance Service.