United States. Bureau of Economic Analysis. "Gross Domestic Product: First Quarter 2001 (Final) | Corporate Profits: First Quarter 2001 (Revised), BEA 01-20,"
Bureau of Economic Analysis (BEA) News Releases
(June 29, 2001).
https://fraser.stlouisfed.org/title/6148/item/597793, accessed on June 13, 2025.