APA
United Nations Economic and Social Information (Deptt of-), United Nations Economic and Social Information (Deptt of-), . (1997). Geograhical information systems for popualation st. New York: United Nations U S A.
Chicago
United Nations Economic and Social Information (Deptt of-), United Nations Economic and Social Information (Deptt of-), . 1997. Geograhical information systems for popualation st. New York: United Nations U S A.
Harvard
United Nations Economic and Social Information (Deptt of-), United Nations Economic and Social Information (Deptt of-), . (1997). Geograhical information systems for popualation st. New York: United Nations U S A.
MLA
United Nations Economic and Social Information (Deptt of-), United Nations Economic and Social Information (Deptt of-), . Geograhical information systems for popualation st. New York: United Nations U S A. 1997.
