United States. Bureau of Economic Analysis. "Gross Domestic Product: Third Quarter 2008 (Preliminary)|Corporate Profits: Third Quarter 2008 (Preliminary) : Technical Note, BEA 08-51,"
Bureau of Economic Analysis (BEA) News Releases
(November 25, 2008).
https://fraser.stlouisfed.org/title/6148/item/600482/content/pdf/bea_newsreleases_20081125_technical-note, accessed on July 12, 2025.