APA (7 वां संस्करण) प्रशस्ति पत्र
DEPARTMENT OF HEALTH AND SOCIAL SECURITY. (1991). MENTAL HANDICAP: PROGRESS, PROBLEMS AND PRIORITIES. HMSO.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
DEPARTMENT OF HEALTH AND SOCIAL SECURITY. MENTAL HANDICAP: PROGRESS, PROBLEMS AND PRIORITIES. Londres: HMSO, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
DEPARTMENT OF HEALTH AND SOCIAL SECURITY. MENTAL HANDICAP: PROGRESS, PROBLEMS AND PRIORITIES. HMSO, 1991.
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