Não informado. (1950). Yearbook of International Trade Statistics. United Nations.
Style de citation Chicago (17e éd.)Não informado. Yearbook of International Trade Statistics. New York: United Nations, 1950.
Style de citation MLA (8e éd.)Não informado. Yearbook of International Trade Statistics. United Nations, 1950.
Attention : ces citations peuvent ne pas être correctes à 100%.