APA (7th ed.) Citation

Institute for Research into Mental Retardation, Clarke, A. D. B., & Lewis, M. M. (1972). Learning, speech and thought in the mentally retarded. Butterworths for the Institute for Research into Mental Retardation.

Chicago Style (17th ed.) Citation

Institute for Research into Mental Retardation, A. D. B. Clarke, and M. M. Lewis. Learning, Speech and Thought in the Mentally Retarded. London: Butterworths for the Institute for Research into Mental Retardation, 1972.

MLA (9th ed.) Citation

Institute for Research into Mental Retardation, et al. Learning, Speech and Thought in the Mentally Retarded. Butterworths for the Institute for Research into Mental Retardation, 1972.