Ashman, A. F., & Laura, R. S. (1985). The education and training of the mentally retarded: Recent advances. Croom Helm.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAshman, A. F., और R. S. Laura. The Education and Training of the Mentally Retarded: Recent Advances. London: Croom Helm, 1985.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAshman, A. F., और R. S. Laura. The Education and Training of the Mentally Retarded: Recent Advances. Croom Helm, 1985.
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