United States. Bureau of Economic Analysis. "Gross Domestic Product, Third Quarter 2019 (Third Estimate) | Corporate Profits, Third Quarter 2019 (Revised Estimate) : Technical Note, BEA 19-69," Bureau of Economic Analysis (BEA) News Releases (December 20, 2019). https://fraser.stlouisfed.org/title/6148/item/602836/content/pdf/bea_newsreleases_20191220_a_technical-note, accessed on March 25, 2025.