United States. Bureau of Economic Analysis. "U.S. International Investment Position: End of the Fourth Quarter and Year 2013 : Full Release, BEA 14-12,"
Bureau of Economic Analysis (BEA) News Releases
(March 26, 2014).
https://fraser.stlouisfed.org/title/6148/item/602092/content/pdf/bea_newsreleases_20140326, accessed on July 15, 2025.