Não informado. (1921). Survey of Current Business. U.S. Department of Commerce.
Style de citation Chicago (17e éd.)Não informado. Survey of Current Business. Washington: U.S. Department of Commerce, 1921.
Style de citation MLA (8e éd.)Não informado. Survey of Current Business. U.S. Department of Commerce, 1921.
Attention : ces citations peuvent ne pas être correctes à 100%.