United States. Bureau of Economic Analysis. "Gross Domestic Product: Third Quarter 2013 (Advance Estimate) : Historical Comparison, BEA 13-50,"
Bureau of Economic Analysis (BEA) News Releases
(November 7, 2013).
https://fraser.stlouisfed.org/title/6148/item/601573/content/pdf/bea_newsreleases_20131107_historical-comparisons, accessed on July 8, 2025.