United States. Bureau of Economic Analysis. "Gross Domestic Product: Third Quarter 2013 (Third Estimate) | Corporate Profits: Third Quarter 2013 (Revised Estimate) : Technical Note, BEA 13-64," Bureau of Economic Analysis (BEA) News Releases (December 20, 2013). https://fraser.stlouisfed.org/title/6148/item/601585/content/pdf/bea_newsreleases_20131220_technical-note, accessed on March 24, 2025.