U.S. International Trade in Goods and Services: August 2018 : Tables, BEA 18-54, CB 18-151
United States. Department of Commerce. "U.S. International Trade in Goods and Services: August 2018 : Tables, BEA 18-54, CB 18-151," United States Department of Commerce News (October 5, 2018). https://fraser.stlouisfed.org/title/6148/item/602662/content/xlsx/bea_newsreleases_20181005_tables-only, accessed on June 11, 2026.