United States. Bureau of Economic Analysis. "Gross Domestic Product for Puerto Rico, 2019 : Summary of Methodologies: Puerto Rico Gross Domestic Product, BEA 21-45," Bureau of Economic Analysis (BEA) News Releases (September 27, 2021). https://fraser.stlouisfed.org/title/6148/item/607751/content/pdf/bea_newsreleases_20210927_summaryofmethodologies, accessed on October 19, 2024.