Theodore Roosevelt Quotes about Perseverance

Theodore Roosevelt, Paul H. Jeffers (1998). “The Bully Pulpit: A Teddy Roosevelt Book of Quotations”, p.21, Taylor Trade Publications
Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.44, Skyhorse Publishing, Inc.
Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.78, Skyhorse Publishing, Inc.