APA
Conference of Latin American Geographers, . (1989). Year Book 1989. Alabama: Auburn University.
Chicago
Conference of Latin American Geographers, . 1989. Year Book 1989. Alabama: Auburn University.
Harvard
Conference of Latin American Geographers, . (1989). Year Book 1989. Alabama: Auburn University.
MLA
Conference of Latin American Geographers, . Year Book 1989. Alabama: Auburn University. 1989.
