United States. Department of Commerce. "U.S. International Transactions: Third Quarter 2008 : Tables, BEA 08-56," United States Department of Commerce News (December 17, 2008). https://fraser.stlouisfed.org/title/6148/item/600486/content/xls/bea_newsreleases_20081217_b_tables-only, accessed on May 31, 2026.