U.S. Bureau of the census. (1967). Guide to foreign trade statistics. v. 1-. U. S. Bureau of the Census.
Citazione stile Chigago Style (17a edizione)U.S. Bureau of the census. Guide to Foreign Trade Statistics. V. 1-. Washington: U. S. Bureau of the Census, 1967.
Citatione MLA (9a ed.)U.S. Bureau of the census. Guide to Foreign Trade Statistics. V. 1-. U. S. Bureau of the Census, 1967.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.