Não informado. (1970). Commerce today. U.S. Department of Commerce.
Chicago-Zitierstil (17. Ausg.)Não informado. Commerce Today. Washington: U.S. Department of Commerce, 1970.
MLA-Zitierstil (8. Ausg.)Não informado. Commerce Today. U.S. Department of Commerce, 1970.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.