United States. Bureau of Economic Analysis. "Gross Domestic Product (Third Estimate), Corporate Profits (Revised Estimate), and GDP by Industry, First Quarter 2023 : Technical Note, BEA 23-27,"
Bureau of Economic Analysis (BEA) News Releases
(June 29, 2023).
https://fraser.stlouisfed.org/title/6148/item/635575/content/pdf/bea_newsreleases_23-27_20230629_technicalNote, accessed on June 23, 2025.