United States. Bureau of Economic Analysis. "Personal Income and Outlays: February 2018 : Full Release, BEA 18-15," Bureau of Economic Analysis (BEA) News Releases (March 29, 2018). https://fraser.stlouisfed.org/title/6148/item/602622/content/pdf/bea_newsreleases_20180329, accessed on June 20, 2025.