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• Hannigan, Robert E. The New World Power: American Foreign Policy, 1898–1917. Philadelphia: University of Pennsylvania Press, 2002.
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• Hunt, John Gabriel, ed. The Essential Theodore Roosevelt. New York: Gramercy Books, 1994.
• Jeffers, H. Paul. The Bully Pulpit: A Teddy Roosevelt Book of Quotations. Dallas, Tex.: Taylor Publishing Company, 1998.
• McCullough, David G. Mornings on Horseback. New York: Simon and Schuster, 1981.
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• Meyer, Balthasar Henry. A History of the Northern Securities Case. New York: Da Capo Press, 1972.
• Morris, Edmund. Colonel Roosevelt. New York: Random House, 2011.
• Morris, Edmund. The Rise of Theodore Roosevelt. 1979; reprint ed., New York: Random House, 2010.