United States. Bureau of Economic Analysis. "U.S. International Trade in Goods and Services: January 2019 : Highlights, Monthly: January 2019 Trade Gap is $51.1 Billion, BEA 19-10, CB 19-37,"
Bureau of Economic Analysis (BEA) News Releases
(March 27, 2019).
https://fraser.stlouisfed.org/title/6148/item/602784/content/pdf/bea_newsreleases_20190327_a_release-highlights-monthly, accessed on June 13, 2025.