1. PAUL, R., 1995, Language Disorders: Infancy through Adolescence: Assessment and intervention (St. Louis, MO: Mosby)
2. SACKETT, D.L., HAYNES, R.B., GUYATT, G.H., and TUGWELL, P., 1991, Clinical Epidemiology: A basic science for clinical medicine, second edition (Boston, MA: Little, Brown & Company)
3. SHRIBERG, L.D., ALLEN, C.T., MCSWEENY, J.L., and WILSON, D.L., 2001, PEPPER: Programs to examine phonetic and phonologic evaluation records [Computer software] (Madison, WI: Waisman Center, University of Wisconsin)
4. SHRIBERG, L.D., and KENT, R.D., 1995, Clinical Phonetics, second edition (Boston, MA: Allyn & Bacon)
5. SHRIBERG, L.D., and KWIATKOWSKI, J., 1980, Natural Process Analysis: A procedure for phonological analysis of continuous speech samples (New York: Macmillan)