United States. Bureau of Economic Analysis. "National Income and Product Accounts | Gross Domestic Product: Second Quarter 2017 (Advance Estimate) | Annual Update: 2014 Through First Quarter 2017 : Historical Comparisons, BEA 17-38,"
Bureau of Economic Analysis (BEA) News Releases
(July 28, 2017).
https://fraser.stlouisfed.org/title/6148/item/602509/content/pdf/bea_newsreleases_20170728_historical-comparisons, accessed on March 27, 2025.