United States. Bureau of Economic Analysis. "U.S. International Trade in Goods and Services: July 2014, BEA 14-42, CB 14-162, FT-900 (14-07),"
Bureau of Economic Analysis (BEA) News Releases
(September 4, 2014).
https://fraser.stlouisfed.org/title/6148/item/602121, accessed on June 18, 2025.