Theodore Roosevelt, H. W. Brands (2001). “African Game Trails: An Account of the African Wanderings of an American Hunter-naturalist”, p.21, Rowman & Littlefield
Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.54, Skyhorse Publishing, Inc.
Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.17, Skyhorse Publishing, Inc.
Theodore Roosevelt (1908). “The Roosevelt Policy: Speeches, Letters and State Papers, Relating to Corporate Wealth and Closely Allied Topics, of Theodore Roosevelt, President of the United States”
Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.14, Skyhorse Publishing, Inc.
Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.13, Skyhorse Publishing, Inc.
Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.75, Skyhorse Publishing, Inc.