Cita APA (7a ed.)
(1993). International Trade: Statistics Yearbook 1991 (1. ed.). United Nations.
Cita Chicago Style (17a ed.)
International Trade: Statistics Yearbook 1991. 1. ed. New York: United Nations, 1993.
Cita MLA (9a ed.)
International Trade: Statistics Yearbook 1991. 1. ed. United Nations, 1993.
Precaución: Estas citas no son 100% exactas.