Citazione Stile APA (7a Edizione)
(1990). Statistical Abstract of the United States 1990: <The> National Data Book (110. ed.). U.S. Department of Commerce.
Citazione stile Chigago Style (17a edizione)
Statistical Abstract of the United States 1990: <The> National Data Book. 110. ed. Washington: U.S. Department of Commerce, 1990.
Citatione MLA (9a ed.)
Statistical Abstract of the United States 1990: <The> National Data Book. 110. ed. U.S. Department of Commerce, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.