United States. Bureau of Economic Analysis. "U.S. International Trade in Goods and Services, June 2007 : Highlights: June 2007 Trade Gap Is $58.1 Billion, BEA 07-37, CB 07-112, FT-900 (07-06),"
Bureau of Economic Analysis (BEA) News Releases
(August 14, 2007).
https://fraser.stlouisfed.org/title/6148/item/598978/content/pdf/bea_newsreleases_20070814_highlights, accessed on June 23, 2025.