(1939). Vital Statistics of the United States: 1937, 1939-1940, 1943-1944. U. S. Department of Commerce.
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Citação norma Chicago
Vital Statistics of the United States: 1937, 1939-1940, 1943-1944. Washington: U. S. Department of Commerce, 1939.
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Citação norma MLA
Vital Statistics of the United States: 1937, 1939-1940, 1943-1944. U. S. Department of Commerce, 1939.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.