United States. Bureau of Economic Analysis. "State Quarterly Personal Income, 1st Quarter 2012-4th Quarter 2012 and State Annual Personal Income, 2012 (Preliminary Estimates), BEA 13-12," Bureau of Economic Analysis (BEA) News Releases (March 27, 2013). https://fraser.stlouisfed.org/title/6148/item/601536, accessed on March 15, 2025.