United States. Bureau of Economic Analysis. "Gross Domestic Product: Third Quarter 2011 (Third Estimate) | Corporate Profits: Third Quarter 2011 (Revised Estimate) : Full Release, BEA 11-63," Bureau of Economic Analysis (BEA) News Releases (December 22, 2011). https://fraser.stlouisfed.org/title/6148/item/604123/content/pdf/bea_newsreleases_20111222, accessed on May 18, 2025.