United States. Bureau of Economic Analysis. "Gross Domestic Product and Corporate Profits: Fourth Quarter 2007 (Final)|Corporate Profits: Fourth Quarter 2007, BEA 08-12,"
Bureau of Economic Analysis (BEA) News Releases
(March 27, 2008).
https://fraser.stlouisfed.org/title/6148/item/600445, accessed on July 13, 2025.