United States. Bureau of the Census. (1990). U.S. exports. U.S. Dept. of Commerce, Bureau of the Census : For sale by the Supt. of Docs., U.S. G.P.O..
Citação do estilo Chicago (17ª ed.)United States. Bureau of the Census. U.S. Exports. Washington, DC: U.S. Dept. of Commerce, Bureau of the Census : For sale by the Supt. of Docs., U.S. G.P.O., 1990.
Citação MLA (8ª ed.)United States. Bureau of the Census. U.S. Exports. U.S. Dept. of Commerce, Bureau of the Census : For sale by the Supt. of Docs., U.S. G.P.O., 1990.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.