United States. Bureau of Economic Analysis. "Personal Income and Outlays: April 2013 : Historical Comparison, BEA 13-22," Bureau of Economic Analysis (BEA) News Releases (May 31, 2013). https://fraser.stlouisfed.org/title/6148/item/601546/content/pdf/bea_newsreleases_20130531_historical-comparison, accessed on March 25, 2025.