United States. Bureau of Economic Analysis. "State Quarterly Personal Income, 1st Quarter 2008-2nd Quarter 2011 | State Annual Personal Income, 2008-2010 (Revised Estimate), BEA 11-48," Bureau of Economic Analysis (BEA) News Releases (September 22, 2011). https://fraser.stlouisfed.org/title/6148/item/604108, accessed on March 22, 2025.