Cita APA (7a ed.)
(1978). Yearbook of international trade statistics 1977. United Nations.
Cita Chicago Style (17a ed.)
Yearbook of International Trade Statistics 1977. New York: United Nations, 1978.
Cita MLA (9a ed.)
Yearbook of International Trade Statistics 1977. United Nations, 1978.
Precaución: Estas citas no son 100% exactas.