United States. Department of Commerce. "U.S. International Trade in Goods and Services, July 2010, BEA 10-43, CB 10-135, FT-900 (10-07),"
United States Department of Commerce News
(September 9, 2010).
https://fraser.stlouisfed.org/title/6148/item/601174, accessed on June 2, 2026.