United States. Bureau of Economic Analysis. "Gross Domestic Product: Third Quarter 2009 (Second Estimate)|Corporate Profits: Third Quarter 2009 (Preliminary) : Technical Note, BEA 09-50,"
Bureau of Economic Analysis (BEA) News Releases
(November 24, 2009).
https://fraser.stlouisfed.org/title/6148/item/600698/content/pdf/bea_newsreleases_20091124_technical-note, accessed on March 26, 2025.