Bishop, D., & Norbury, C. (2009). Speech and Language Disorders. Blackwell Publishing Ltd.
Lua i Stíl Chicago (17ú heag.)Bishop, D., agus C. Norbury. Speech and Language Disorders. Blackwell Publishing Ltd, 2009.
Lua MLA (9ú heag.)Bishop, D., agus C. Norbury. Speech and Language Disorders. Blackwell Publishing Ltd, 2009.
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