^ Vincent Voice Library, Michigan State University, archived from the original (audio clips) on June 3, 2013, retrieved July 17, 2012.

^ "MSU". Retrieved September 14, 2010.

^ Roosevelt, Theodore (1913a).  Youngman, Elmer H (ed.). Progressive Principles. New York: Progressive National Service. p. 215. Archived from the original on December 22, 2020. Retrieved April 14, 2009.

^ "Some rare photos of flight with Arch Hoxsey".

Print sources
Main articles: Bibliography of Theodore Roosevelt and Books Written by Theodore Roosevelt
Full biographies
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Brands, Henry William (1997), TR: The Last Romantic (full biography), New York: Basic Books, ISBN 978-0-465-06958-3, OCLC 36954615.
Chessman, G Wallace (1965), Governor Theodore Roosevelt: The Albany Apprenticeship, 1898–1900
Cooper, John Milton (1983), The Warrior and the Priest: Woodrow Wilson and Theodore Roosevelt (dual scholarly biography), ISBN 978-0-674-94751-1.
Dalton, Kathleen (2002), Theodore Roosevelt: A Strenuous Life (full scholarly biography), ISBN 0-679-76733-9.
Gould, Lewis L (2012), Theodore Roosevelt, ISBN 978-0-19-979701-1, 105 pp, very short biography by leading scholar.
Harbaugh, William Henry (1963), The Life and Times of Theodore Roosevelt (full scholarly biography), Farrar, Straus And Cudahy.