Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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