United States. Bureau of Economic Analysis. "Prototype Gross Domestic Product for Puerto Rico, 2012-2018 : Full Release, BEA 20-46," Bureau of Economic Analysis (BEA) News Releases (September 28, 2020). https://fraser.stlouisfed.org/title/6148/item/602921/content/pdf/bea_newsreleases_20200928, accessed on May 18, 2025.