United States. Bureau of Economic Analysis. "State Quarterly Personal Income, 1st Quarter 2004-4th Quarter 2007; State Annual Personal Income, 2007 (Preliminary), BEA 08-11," Bureau of Economic Analysis (BEA) News Releases (March 26, 2008). https://fraser.stlouisfed.org/title/6148/item/600444, accessed on March 16, 2025.