Não informado. Foreign trade reports. U.S. Department of Commerce, Bureau of the Census.
Chicago-referens (17:e uppl.)Não informado. Foreign Trade Reports. Washington: U.S. Department of Commerce, Bureau of the Census.
MLA-referens (8:e uppl.)Não informado. Foreign Trade Reports. U.S. Department of Commerce, Bureau of the Census.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.