Não informado. Programs for the Handicapped. Office for the Handicapped, Department of Health, Education and Welfare.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Programs for the Handicapped. Washington: Office for the Handicapped, Department of Health, Education and Welfare.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Programs for the Handicapped. Office for the Handicapped, Department of Health, Education and Welfare.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.