Cita APA (7a ed.)
(1977). Statistical abstract of the United States 1977. Department of Commerce : National Bureau of Standards.
Cita estilo Chicago (17a ed.)
Statistical Abstract of the United States 1977. Washington, EUA: Department of Commerce : National Bureau of Standards, 1977.
Cita MLA (9a ed.)
Statistical Abstract of the United States 1977. Department of Commerce : National Bureau of Standards, 1977.
Precaución: Estas citas no son 100% exactas.