United States. Department of Commerce. "U.S. International Trade in Goods and Services, May 2010, BEA 10-36, CB 10-10, FT-900 (10-05),"
United States Department of Commerce News
(July 13, 2010).
https://fraser.stlouisfed.org/title/6148/item/601167, accessed on June 1, 2026.