Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.42, Skyhorse Publishing, Inc.
Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.76, Skyhorse Publishing, Inc.
Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.51, Skyhorse Publishing, Inc.
Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.44, Skyhorse Publishing, Inc.
Theodore Roosevelt (2012). “Compilation of the Messages and Papers of the Presidents Section 2 (of 2) of Supplemental Volume: Theodore Roosevelt, Supplement”, p.23, tredition
United States. President (1901-1909 : Roosevelt), Theodore Roosevelt (1906). “Message of the President of the United States Communicated to the Two Houses of Congress at the Beginning of the Second Session of the Fifty-ninth Congress”
Theodore Roosevelt's address to the nation (March 4, 1905), as quoted in "Ten Memorable Inaugural Addresses", www.realclearpolitics.com. January 16, 2013.