Não informado. (1962). Foreign trade statistics for Africa. United Nations, Economic Commission for Africa.
Style de citation Chicago (17e éd.)Não informado. Foreign Trade Statistics for Africa. New York: United Nations, Economic Commission for Africa, 1962.
Style de citation MLA (8e éd.)Não informado. Foreign Trade Statistics for Africa. United Nations, Economic Commission for Africa, 1962.
Attention : ces citations peuvent ne pas être correctes à 100%.