United States. Bureau of Economic Analysis. "U.S. International Trade In Goods And Services: February 2017 : Full Release, BEA 17-16, CB 17-48, FT-900 (17-02),"
Bureau of Economic Analysis (BEA) News Releases
(April 4, 2017).
https://fraser.stlouisfed.org/title/6148/item/602487/content/pdf/bea_newsreleases_20170404, accessed on May 21, 2025.