Não informado. Foreign trade reports. U.S. Department of Commerce, Bureau of the Census.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Foreign Trade Reports. Washington: U.S. Department of Commerce, Bureau of the Census.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Foreign Trade Reports. U.S. Department of Commerce, Bureau of the Census.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.