United States. Bureau of Economic Analysis. "U.S. International Trade in Goods and Services, February 2021 : Highlights: February 2021 Trade Gap is $71.1 Billion, BEA 21-17, CB 21-50," Bureau of Economic Analysis (BEA) News Releases (April 7, 2021). https://fraser.stlouisfed.org/title/6148/item/601759/content/pdf/bea_newsreleases_20210407_highlights, accessed on March 15, 2025.