Gross Domestic Product, Second Quarter 2021 (Advance Estimate) and Annual Update : Key Source Data and Assumptions, BEA 21-36
United States. Department of Commerce. "Gross Domestic Product, Second Quarter 2021 (Advance Estimate) and Annual Update : Key Source Data and Assumptions, BEA 21-36," United States Department of Commerce News (July 29, 2021). https://fraser.stlouisfed.org/title/6148/item/604940/content/xlsx/bea_newsreleases_20210729_keysourcedata, accessed on June 1, 2026.