United States. Bureau of Economic Analysis. "State Quarterly Personal Income, 1st Quarter 2006-4th Quarter 2009; State Annual Personal Income, 2009 (Preliminary Estimate), BEA 10-10,"
Bureau of Economic Analysis (BEA) News Releases
(March 25, 2010).
https://fraser.stlouisfed.org/title/6148/item/601142, accessed on May 21, 2025.