Blackman, J. A. (1995). Innovations in practice in early intervention. Aspen.
Lua i Stíl Chicago (17ú heag.)Blackman, James A. Innovations in Practice in Early Intervention. Gaithersburg, Md: Aspen, 1995.
Lua MLA (9ú heag.)Blackman, James A. Innovations in Practice in Early Intervention. Aspen, 1995.
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