1. Julian Go, Patterns of Empire: The British and American Empires, 1688 to the Present. Cambridge: Cambridge University Press, 2011, p. 170.
2. Paul Kennedy, The Rise and Fall of Great Powers. London: Unwin Hyman, 1988, p. 226.
3. Bernard Porter, Empire and Superempire. New Haven, CT: Yale University Press, 2006, p. 15.
4. John Darwin, The Empire Project. Cambridge: Cambridge University Press, 2009, p. 58.
5. David Reynolds, Britannia Overruled: British Policy and World Power in the Twentieth Century. London: Longman, 1991, p. 24.