(1977). Statistical abstract of the united states 1977 (98th Ed.). U.S. Bureau of the Census.
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Citação norma Chicago
Statistical Abstract of the United States 1977. 98th Ed. Washington: U.S. Bureau of the Census, 1977.
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Citação norma MLA
Statistical Abstract of the United States 1977. 98th Ed. U.S. Bureau of the Census, 1977.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.