Não informado. (1978). The Journal for Vocational Special Needs Education. National Association of Vocational Education Special Needs Personnel.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The Journal for Vocational Special Needs Education. Denton, Tex: National Association of Vocational Education Special Needs Personnel, 1978.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The Journal for Vocational Special Needs Education. National Association of Vocational Education Special Needs Personnel, 1978.
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