Ashman, A. F., & Laura, R. S. (1985). The education and training of the mentally retarded: Recent advances. Croom Helm.
Chicago-viite (17. p.)Ashman, A. F., ja R. S. Laura. The Education and Training of the Mentally Retarded: Recent Advances. London: Croom Helm, 1985.
MLA-viite (9. p.)Ashman, A. F., ja R. S. Laura. The Education and Training of the Mentally Retarded: Recent Advances. Croom Helm, 1985.
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