O'Connor, N., & Hermelin, B. (1963). Speech and thought in severe subnormality; an experimental study. Macmillan.
Citace podle Chicago (17th ed.)O'Connor, N., a Beate Hermelin. Speech and Thought in Severe Subnormality; an Experimental Study. New York: Macmillan, 1963.
Citace podle MLA (9th ed.)O'Connor, N., a Beate Hermelin. Speech and Thought in Severe Subnormality; an Experimental Study. Macmillan, 1963.
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