United States. Bureau of Economic Analysis. "U.S. International Trade in Goods and Services: August 2003, CB 03-161, BEA 03-40, FT-900 (03-08),"
Bureau of Economic Analysis (BEA) News Releases
(October 10, 2003).
https://fraser.stlouisfed.org/title/6148/item/597885, accessed on July 18, 2025.