United States. Bureau of Economic Analysis. "Personal Income and Outlays: May 2011 : Highlights: Personal Income Rises in May, BEA 11-33," Bureau of Economic Analysis (BEA) News Releases (June 27, 2011). https://fraser.stlouisfed.org/title/6148/item/604093/content/pdf/bea_newsreleases_20110627_release-highlights, accessed on March 20, 2025.