"About This Collection: The Spanish-American War in Motion Pictures." Library of Congress, n.d., www.loc.gov/collections/spanish-american-war-in-motion-pictures/about-this-collection/#overview
Kinzer, Stephen. The True Flag: Theodore Roosevelt, Mark Twain, and the Birth of the American Empire. Holt, 2017.
Raico, Ralph. "American Foreign Policy: The Turning Point, 1898–1919." Independent Institute, 1 Feb. 1995, www.independent.org/newsroom/article.asp?id=1345
Ries, John, and Mark Weber. "The Fateful Year 1898: The United States Becomes an Imperial Power, The Great Debate Over American Overseas Expansion." The Journal of Historical Review, vol. 13, no. 4, July–August 1993, pp. 4–13, www.ihr.org/jhr/v13/v13n4p4_Ries.html
Roosevelt, Theodore. The Autobiography of Theodore Roosevelt. Seven Treasures, 2009.