United States. Bureau of Economic Analysis. "Gross Domestic Product: Second Quarter 2012 (Third Estimate) | Corporate Profits: Second Quarter 2012 (Revised Estimate) : Technical Note, BEA 12-44," Bureau of Economic Analysis (BEA) News Releases (September 27, 2012). https://fraser.stlouisfed.org/title/6148/item/601357/content/pdf/bea_newsreleases_20120927_technical-note, accessed on March 21, 2025.