United States. Bureau of Economic Analysis. "Gross Domestic Product: Fourth Quarter 2008 (Final)|Corporate Profits: Fourth Quarter 2008 (Final) : Highlights: Real GDP Declines 6.3 Percent in Fourth Quarter, BEA 09-11,"
Bureau of Economic Analysis (BEA) News Releases
(March 26, 2009).
https://fraser.stlouisfed.org/title/6148/item/600661/content/pdf/bea_newsreleases_20090326_release-highlights, accessed on June 13, 2025.