United Nations Office at Vienna. Center for Social Development and Humanitarian Affairs. (1988). Handbook of organizations active in the field of aging. United Nations.
Chicago-viite (17. p.)United 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.
MLA-viite (9. p.)United 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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