Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.54, Skyhorse Publishing, Inc.
"New Nationalism Speech". Theodore Roosevelt's speech at the Dedication of the John Brown Memorial Park in Osawatomie, Kansas, teachingamericanhistory.org. August 31, 1910.
Theodore Roosevelt, Eugene Thwing (1919). “Newer Roosevelt messages: speeches, letters and magazine articles dealing with the war, before and after, and other vital topics”