Não informado. (1921). Survey of Current Business. U.S. Department of Commerce.
Chicagoスタイル(17版)引用形式Não informado. Survey of Current Business. Washington: U.S. Department of Commerce, 1921.
MLA(8版)引用形式Não informado. Survey of Current Business. U.S. Department of Commerce, 1921.
警告: この引用は必ずしも正確ではありません.