United States. Bureau of Economic Analysis. "Personal Income and Outlays, September 2018 : Highlights: Durable Goods Spending Rises in September, BEA 18-57," Bureau of Economic Analysis (BEA) News Releases (October 29, 2018). https://fraser.stlouisfed.org/title/6148/item/602665/content/pdf/bea_newsreleases_20181029_release-highlights, accessed on March 17, 2025.