„The Great Seal of the United States“. U.S. Department of State, Bureau of Public Affairs (2003). Qaraldi: 12-fevral 2020-yil.
↑ „State Area Measurements and Internal Point Coordinates“. Census.gov (avgust 2010). — „reflect base feature updates made in the MAF/TIGER database through August, 2010.“. Qaraldi: 31-mart 2020-yil.
↑ „Surface water and surface water change“. Organisation for Economic Co-operation and Development (OECD) (2015). Qaraldi: 11-oktabr 2020-yil.
↑ „Census Bureau's 2020 Population Count“. United States Census. Qaraldi: 26-aprel 2021-yil. The 2020 census is as of April 1, 2020.
↑ Jump up to:5,05,15,25,3 „World Economic Outlook Database, October 2021“. IMF.org. Xalqaro valyuta jamgʻarmasi. Qaraldi: 27-yanvar 2022-yil.
↑ „Common Core Document of the United States of America“. U.S. Department of State (30-dekabr 2011-yil). Qaraldi: 10-iyul 2015-yil.
↑ The New York Times 2007, s. 670.
↑ Onuf 2010, s. xvii.
↑ Francis, Ellen. „Global freedoms have hit a ʻdismal’ record low, with pandemic restrictions making things worse, report says“ (en-US). The Washington Post (10-fevral 2022-yil). Qaraldi: 18-fevral 2022-yil.
↑ „Historical Census Statistics On Population Totals By Race, 1790 to 1990, and By Hispanic Origin, 1970 to 1990, For Large Cities And Other Urban Places In The United States“. census.gov. 12-avgust 2012-yilda asl nusxadan arxivlandi. Qaraldi: 28-may 2013-yil.