United States. Bureau of Economic Analysis. "Gross Domestic Product: Fourth Quarter and Annual 2012 (Advance Estimate) : Highlights: GDP Declines Slightly in Fourth Quarter, BEA 13-02,"
Bureau of Economic Analysis (BEA) News Releases
(January 30, 2013).
https://fraser.stlouisfed.org/title/6148/item/601526/content/pdf/bea_newsreleases_20130130_release-highlights, accessed on July 14, 2025.