1. Baker, K. (1995). The Prime Ministers: An Irreverent Political History in Cartoons. Thames and Hudson: Slovenia.
2. Bale, T., & Sanders, K. (2001). Playing by the Book: Success and Failure in John Major’s Approach to Prime Ministerial Media Management. Contemporary British History, 15(4), 93–110.
3. Barber, J. D (1992). The Presidential Character: Predicting Performance in the White House. Upper Saddle River: Prentice-Hall International.
4. Beesley, I. (2017). The Official History of the Cabinet Secretaries. London and New York: Routledge.
5. Bose, M. (2006). What Makes a Great President? An Analysis of Leadership Qualities in Fred I. Greenstein’s the Presidential Difference. In L. Berman (Ed.), The Art of Political Leadership: Essays in Honor of Fred I. Greenstein (2005). Lanham: Rowman & Littlefield Publishers.