United States. Bureau of Economic Analysis. "Personal Income and Outlays: April 2018 : Highlights: Real Disposable Personal Income Increases in April, BEA 18-25,"
Bureau of Economic Analysis (BEA) News Releases
(May 31, 2018).
https://fraser.stlouisfed.org/title/6148/item/602633/content/pdf/bea_newsreleases_20180531_release-highlights, accessed on July 19, 2025.