United States. Bureau of Economic Analysis. "Personal Income and Outlays; April 2009 : Highlights: Personal Income Rises in April, BEA 09-21," Bureau of Economic Analysis (BEA) News Releases (June 1, 2009). https://fraser.stlouisfed.org/title/6148/item/600671/content/pdf/bea_newsreleases_20090601_release-highlights, accessed on March 19, 2025.