Não informado. (1966). Education and Training of the Mentally Retarded. Council for Exceptional Children, Division on Mental Retardation.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Education and Training of the Mentally Retarded. Reston, Va: Council for Exceptional Children, Division on Mental Retardation, 1966.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Education and Training of the Mentally Retarded. Council for Exceptional Children, Division on Mental Retardation, 1966.
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