United States. Bureau of Economic Analysis. "Personal Income and Outlays: December 2015 : Highlights: Real Disposable Income Rises in December, BEA 16-05," Bureau of Economic Analysis (BEA) News Releases (February 1, 2016). https://fraser.stlouisfed.org/title/6148/item/602324/content/pdf/bea_newsreleases_20160201_release-highlights, accessed on March 20, 2025.