United States. Bureau of Economic Analysis. "U.S. International Trade in Goods and Services: June 2014 : Information on Goods and Services, BEA 14-36, CB 14-146, FT-900 (14-06)," Bureau of Economic Analysis (BEA) News Releases (August 6, 2014). https://fraser.stlouisfed.org/title/6148/item/602115/content/pdf/bea_newsreleases_20140806_information-section, accessed on March 23, 2025.