United Nations Office at Vienna. Center for Social Development and Humanitarian Affairs. (1988). Handbook of organizations active in the field of aging. United Nations.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited Nations Office at Vienna. Center for Social Development and Humanitarian Affairs. Handbook of Organizations Active in the Field of Aging. New York: United Nations, 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnited Nations Office at Vienna. Center for Social Development and Humanitarian Affairs. Handbook of Organizations Active in the Field of Aging. United Nations, 1988.
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