United States. Bureau of Economic Analysis. "U.S. International Trade in Goods and Services: September 2008, BEA 08-50, CB 08-166, FT-900 (08-09),"
Bureau of Economic Analysis (BEA) News Releases
(November 13, 2008).
https://fraser.stlouisfed.org/title/6148/item/600481, accessed on January 19, 2026.