1. Agocs, M. M., Burns, M. S., De Ley, L. E., Miller, S. L., & Calhoun, B. M. (2006). Fast forword language. In R. J. McCauley & M. E. Fey (Eds.), Treatment of language disorders in children (pp. 471–508). Baltimore, MD: Paul H. Brookes.
2. American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). Washington, DC: American Psychiatric Association.
3. Beitchman, J., Hood, J., Rochon, J., & Peterson, J. (1989). Empirical classification of speech and language impairment in children: Behavioral characteristics. Journal of the American Academy of Child and Adolescent Psychiatry, 28, 118–123.
4. Beitchman, J., Nair, R., Clegg, M., Fergusson, B., & Patel, P. (1986). Prevalence of speech and language disorders in 5-year-old kindergarten children in the Ottawa-Carleton region. Journal of Speech and Hearing Disorders, 51, 98–110.
5. Bernstein-Ratner, N. (2013). Atypical language development. In J. Berko Gleason & N. Bernstein Ratner (Eds.), The development of language (8th ed., pp. 266–328). New York: Pearson.