Lua APA (7ú heag.)

Não informado. (1980). Behavior research of severe developmental disabilities. North Holland Publishing.

Lua i Stíl Chicago (17ú heag.)

Não informado. Behavior Research of Severe Developmental Disabilities. Amsterdam: North Holland Publishing, 1980.

Lua MLA (8ú heag.)

Não informado. Behavior Research of Severe Developmental Disabilities. North Holland Publishing, 1980.

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