United States. Bureau of Economic Analysis. "Gross Domestic Product, First Quarter 2019 (Third Estimate)| Corporate Profits, First Quarter 2019 (Revised Estimate) : Technical Note, BEA 19-29," Bureau of Economic Analysis (BEA) News Releases (June 27, 2019). https://fraser.stlouisfed.org/title/6148/item/602802/content/pdf/bea_newsreleases_20190627_technical-note, accessed on March 26, 2025.