United States. Bureau of Economic Analysis. "U.S. International Trade in Goods and Services: July 2018 : Highlights: July 2018 Trade Gap is $50.1 Billion, BEA 18-45, CB 18-129," Bureau of Economic Analysis (BEA) News Releases (September 5, 2018). https://fraser.stlouisfed.org/title/6148/item/602653/content/pdf/bea_newsreleases_20180905_release-highlights-monthly, accessed on March 27, 2025.