John Stuart Mill (2008). “Utilitarianism and On Liberty: Including 'Essay on Bentham' and Selections from the Writings of Jeremy Bentham and John Austin”, p.55, John Wiley & Sons
Benjamin Disraeli (1871). “Collected Edition of the Novels and Tales by the Right Honorable B. Disraeli: Contarini Fleming and The rise of Iskander”, p.276