Neisworth, J. T., & Smith, R. M. (1978). Retardation: Issues, assessment, and intervention. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNeisworth, John T., और Robert McNeil Smith. Retardation: Issues, Assessment, and Intervention. New York: McGraw-Hill, 1978.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNeisworth, John T., और Robert McNeil Smith. Retardation: Issues, Assessment, and Intervention. McGraw-Hill, 1978.
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