U.S. International Trade in Goods and Services: September 2018 : Tables, BEA 18-59, CB 18-165
United States. Department of Commerce. "U.S. International Trade in Goods and Services: September 2018 : Tables, BEA 18-59, CB 18-165," United States Department of Commerce News (November 2, 2018). https://fraser.stlouisfed.org/title/6148/item/602667/content/xlsx/bea_newsreleases_20181102_tables-only, accessed on May 30, 2026.