United States. Bureau of Economic Analysis. "U.S. International Trade in Goods and Services: April 2020 : Highlights: April 2020 Trade Gap is $49.4 Billion, BEA 20-25, CB 20-81," Bureau of Economic Analysis (BEA) News Releases (June 4, 2020). https://fraser.stlouisfed.org/title/6148/item/602900/content/pdf/bea_newsreleases_20200604_a_release-highlights, accessed on March 5, 2025.