Style de citation APA (7e éd.)
(1991). Statistical Abstract of the United States 1991: <The> National Data Book (111. ed.). U.S. Department of Commerce.
Style de citation Chicago (17e éd.)
Statistical Abstract of the United States 1991: <The> National Data Book. 111. ed. Washington: U.S. Department of Commerce, 1991.
Style de citation MLA (9e éd.)
Statistical Abstract of the United States 1991: <The> National Data Book. 111. ed. U.S. Department of Commerce, 1991.
Attention : ces citations peuvent ne pas être correctes à 100%.