United States. Department of Commerce. "U.S. International Trade in Goods and Services: November 2008, BEA 09-01, CB 09-04, FT-900 (08-11),"
United States Department of Commerce News
(January 13, 2009).
https://fraser.stlouisfed.org/title/6148/item/600651, accessed on June 17, 2026.