Não informado. (2001). International Trade Statistics Yearbook. United Nations.
Style de citation Chicago (17e éd.)Não informado. International Trade Statistics Yearbook. New York: United Nations, 2001.
Style de citation MLA (8e éd.)Não informado. International Trade Statistics Yearbook. United Nations, 2001.
Attention : ces citations peuvent ne pas être correctes à 100%.