United States. Bureau of Economic Analysis. "State Personal Income, First Quarter 2007 : Highlights: State Personal Income: First Quarter 2007, BEA 07-29," Bureau of Economic Analysis (BEA) News Releases (June 21, 2007). https://fraser.stlouisfed.org/title/6148/item/598970/content/pdf/bea_newsreleases_20070621_highlights, accessed on July 16, 2025.