APA
United Nations & World Health Organization, . (1991). The AIDS epidemic and its demographic consequences. United Nations, New York: .
Chicago
United Nations & World Health Organization, . 1991. The AIDS epidemic and its demographic consequences. United Nations, New York: .
Harvard
United Nations & World Health Organization, . (1991). The AIDS epidemic and its demographic consequences. United Nations, New York: .
MLA
United Nations & World Health Organization, . The AIDS epidemic and its demographic consequences. United Nations, New York: . 1991.