United States. Bureau of Economic Analysis. "Gross Domestic Product, 4th Quarter and Year 2020 (Second Estimate) : Effects of Selected Federal Pandemic Response Programs on Personal Income, BEA 21-06," Bureau of Economic Analysis (BEA) News Releases (February 25, 2021). https://fraser.stlouisfed.org/title/6148/item/600711/content/pdf/bea_newsreleases_20210225_effects-personal-2020Q4-2nd, accessed on March 18, 2025.