United States. Bureau of Economic Analysis. "Real Personal Income for States and Metropolitan Areas, 2007-2011 (Prototype Estimate) : Full Release, BEA 13-26,"
Bureau of Economic Analysis (BEA) News Releases
(June 12, 2013).
https://fraser.stlouisfed.org/title/6148/item/601549/content/pdf/bea_newsreleases_20130612, accessed on July 20, 2025.