Watson, L. R., Crais, E. R., & Layton, T. L. (2000). Handbook of early language impairment in children: Assessment and intervention. Delmar Thomson Learning.
Lua i Stíl Chicago (17ú heag.)Watson, Linda R., Elizabeth R. Crais, agus Thomas L. Layton. Handbook of Early Language Impairment in Children: Assessment and Intervention. Albany, N.Y: Delmar Thomson Learning, 2000.
Lua MLA (9ú heag.)Watson, Linda R., et al. Handbook of Early Language Impairment in Children: Assessment and Intervention. Delmar Thomson Learning, 2000.
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