Cita APA

(1997). Statistical abstract of the United States 1997: The national data book (117. edition.). Washington, D.C.: Departamento of Commerce.

Citación estilo Chicago

Statistical Abstract of the United States 1997: The National Data Book. 117. edition. Washington, D.C.: Departamento of Commerce, 1997.

Cita MLA

Statistical Abstract of the United States 1997: The National Data Book. 117. edition. Washington, D.C.: Departamento of Commerce, 1997.