^ Marcus Cunliffe, "Theodore Roosevelt, President of the United States 1901–1908" History Today (Sept 1955) 4#9 pp592-601.

^ Thayer 1919, pp. 22–24, Chapter XVII.

^ Shaw, KB; Maiden, David (2006), "Theodore Roosevelt", Biographies, Inc well, archived from the original on March 12, 2006, retrieved March 7, 2006.

^ ukemi (2019), "Theodore Roosevelt", Roosevelt's Judo experience, Stack Exchange, archived from the original on September 19, 2020, retrieved April 10, 2020.

^ Jump up to: a b Rouse, Wendy (November 1, 2015). "Jiu-Jitsuing Uncle SamThe Unmanly Art of Jiu-Jitsu and the Yellow Peril Threat in the Progressive Era United States". Pacific Historical Review. 84 (4): 448–477. doi:10.1525/phr.2015.84.4.448. ISSN 0030-8684. Archived from the original on February 14, 2021. Retrieved February 9, 2021.

^ Rouse, Wendy (2017). Her Own Hero: The Origins of the Women's Self-Defense Movement. New York: New York University Press. ISBN 978-1-4798-0729-1. Archived from the original on February 27, 2021. Retrieved February 9, 2021.

^ Amberger, J Christoph (1998), Secret History of the Sword Adventures in Ancient Martial Arts, ISBN 1-892515-04-0.

^ Burton, David H (1988), The Learned Presidency, p. 12.

^ Kathleen Dalton notes that historians have preferred retelling the "oft-repeated accounts of warmongering."Dalton 2002, p. 522.

