APA
United Nations D. o. I., . (1991). Child mortality in developing countries: Socio-economic diff. New York: United Nations.
Chicago
United Nations Dept of Intern, . 1991. Child mortality in developing countries: Socio-economic diff. New York: United Nations.
Harvard
United Nations D. o. I., . (1991). Child mortality in developing countries: Socio-economic diff. New York: United Nations.
MLA
United Nations Dept of Intern, . Child mortality in developing countries: Socio-economic diff. New York: United Nations. 1991.