pacts: Background and History". Council on State Governments. Retrieved 25 September 2013.
- a. Third Constitution of Kentucky (1850), Article 2, Section 1 ff. Other portions of the same Constitution refer to the "State of Kentucky"
b. Constitution of the Commonwealth of Massachusetts, Preamble.
c. Constitution of Pennsylvania, Preamble.
d. Constitution of Virginia (1971), Article IV, Section 1.
- U.S. Const. art. IV, § 3, cl. 2 ("The Congress shall have Power to dispose of and make all needful Rules and Regulations respecting the Territory or other Property belonging to the United States...").
- Stein, Mark (2008). How the States Got Their Shapes. New York: Collins (HarperCollinsPublishers) [Smithsonian Books]. pp. xvi + 334. ISBN 9780061431395.
- Richard Bruce Winders (2002). Crisis in the Southwest: the United States, Mexico, and the struggle over Texas. Rowman & Littlefield. pp. 82, 92. ISBN 978-0-8420-2801-1.
- "THE ELLIS ISLAND VERDICT: THE RULING; High Court Gives New Jersey Most of Ellis Island". New York Times. Retrieved August 2, 2012.
- "Rules of the House of Representatives" (PDF). Retrieved July 25, 2010.
- Puerto Ricans favor statehood for first time
- Puerto Ricans opt for statehood
- The Senate and the House of Representative of Puerto Rico Concurrent Resolution
- Pierluisi Introduces Historic Legislation
- Stein, Mark, How the States Got Their Shapes, New York : Smithsonian Books/Collins, 2008. ISBN 978-0-06-143138-8
- Information about All States from UCB Libraries GovPubs
- State Resource Guides, from the Library of Congress
- Tables with areas, populations, densities and more (in order of population)
- Tables with areas, populations, densities and more (alphabetical)
- State and Territorial Governments on USA.gov
- StateMaster – statistical database for U.S. states
- U.S. States: Comparisons, rankings, demographics