United States. Bureau of Economic Analysis. "Gross Domestic Product, Third Quarter 2020 (Advance Estimate) : Historical Comparisons, BEA 20-53," Bureau of Economic Analysis (BEA) News Releases (October 29, 2020). https://fraser.stlouisfed.org/title/6148/item/602928/content/pdf/bea_newsreleases_20201029_historicalcomparisons, accessed on March 19, 2025.