APA (7th ed.) Citation

O'Connor, N., & Hermelin, B. (1963). Speech and thought in severe subnormality: An experimental study. Pergamon Press.

Chicago Style (17th ed.) Citation

O'Connor, Neil, and Beate Hermelin. Speech and Thought in Severe Subnormality: An Experimental Study. Oxford, New York: Pergamon Press, 1963.

MLA (9th ed.) Citation

O'Connor, Neil, and Beate Hermelin. Speech and Thought in Severe Subnormality: An Experimental Study. Pergamon Press, 1963.