1. Arena, L. (2011). From Economics of the Firm to Business Studies at Oxford: An Intellectual History (1890s–1990s). University of Oxford. English.
2. Ayer, A. J. (1952 [1936]). Language, Truth and Logic. New York: Courier Corporation.
3. Ayer, A. J. (2002). That Would Indeed Be a Shock to Common Sense. In D. Ramsay (Ed.), Steele Genius: In Their Own Words (pp. 302–348). Chicago and La Salle, IL: Open Court.
4. Ayer, A. J. (2006 [1972]). Probability and Evidence. New York: Columbia University Press.
5. Berlin, I. (2009). Enlightening Letters. 1946–1960 (H. Hardy & J. Holmes, Eds.). London: Chatto and Windus.