Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.37, Skyhorse Publishing, Inc.
Booker T. Washington (1901). “An Autobiography: The Story of My Life and Work, the Original Brought Up-to-date with Over Half a Hundred Full Page Photo and Halftone Engravings and Drawings by Frank Beard”
Fellowship of Christian Athletes, John Wooden (2010). “The Greatest Coach Ever: Timeless Wisdom and Insights of John Wooden”, p.101, Gospel Light Publications