United States. Bureau of Economic Analysis. "Growth in Goods and Services Industries Slowed in 2011 : Full Release : Revised Statistics of Gross Domestic Product by Industry for 2009-2011, BEA 12-51," Bureau of Economic Analysis (BEA) News Releases (November 13, 2012). https://fraser.stlouisfed.org/title/6148/item/601364/content/pdf/bea_newsreleases_20121113, accessed on March 22, 2025.