United States. Department of Commerce. "Gross Domestic Product: Fourth Quarter 2011 and Annual 2011 (Third Estimate) | Corporate Profits: Fourth Quarter 2011 and Annual 2011, BEA 12-11,"
United States Department of Commerce News
(March 29, 2012).
https://fraser.stlouisfed.org/title/6148/item/601325, accessed on June 16, 2026.