United States. Bureau of Economic Analysis. "Gross Domestic Product by State, 4th Quarter and Annual 2019 : Washington Had the Fastest Growth in the Fourth Quarter, BEA 20-18,"
Bureau of Economic Analysis (BEA) News Releases
(April 7, 2020).
https://fraser.stlouisfed.org/title/6148/item/602893, accessed on November 18, 2025.