U.S. International Trade in Goods and Services: December 2019 : Tables, BEA 20-06, CB 20-19
United States. Department of Commerce. "U.S. International Trade in Goods and Services: December 2019 : Tables, BEA 20-06, CB 20-19," United States Department of Commerce News (February 5, 2020). https://fraser.stlouisfed.org/title/6148/item/602881/content/xlsx/bea_newsreleases_20200205_tables-only, accessed on May 30, 2026.