United States. Bureau of Economic Analysis. "Gross Domestic Product by State: Second Quarter 2017 : Highlights: GDP by State Second Quarter 2017, BEA 17-61," Bureau of Economic Analysis (BEA) News Releases (November 21, 2017). https://fraser.stlouisfed.org/title/6148/item/602532/content/pdf/bea_newsreleases_20171121_release-highlights, accessed on March 15, 2025.