O'Connor, N., & Hermelin, B. (1963). Speech and thought in severe subnormality; an experimental study. Macmillan.
Citazione stile Chigago Style (17a edizione)O'Connor, N., e Beate Hermelin. Speech and Thought in Severe Subnormality; an Experimental Study. New York: Macmillan, 1963.
Citatione MLA (9a ed.)O'Connor, N., e Beate Hermelin. Speech and Thought in Severe Subnormality; an Experimental Study. Macmillan, 1963.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.