United States. Bureau of Economic Analysis. "Gross Domestic Product: First Quarter 2011 (Third Estimate) | Corporate Profits: First Quarter 2011 (Revised Estimate), BEA 11-32,"
Bureau of Economic Analysis (BEA) News Releases
(June 24, 2011).
https://fraser.stlouisfed.org/title/6148/item/604092, accessed on November 18, 2025.