United States. Bureau of Economic Analysis. "State Personal Income, Second Quarter 2007 : Highlights: State Personal Income: Second Quarter 2007, BEA 07-42,"
Bureau of Economic Analysis (BEA) News Releases
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https://fraser.stlouisfed.org/title/6148/item/598983/content/pdf/bea_newsreleases_20070920_highlights, accessed on July 12, 2025.