Bull, George. Inside the Vatican. New York: St. Martin's, 1983.
Chadwick, Owen. Britain and the Vatican during the Second World War. New York: Cambridge University Press, 1986.
Duursma, Jorri. Self-Determination, Statehood, and International Relations of Micro-States: The Cases of Liechtenstein, San Marino, Monaco, Andorra, and the Vatican City. New York: Cambridge University Press, 1996.
McDowell, Bart. Inside the Vatican. Washington, D.C.: National Geographic Society, 1991.
Reese, Thomas J. Inside the Vatican: The Politics and Organization of the Catholic Church. Cambridge, Mass.: Harvard University Press, 1996.
Rhodes, Anthony Richard Ewart. The Vatican in the Age of the Cold War, 1945–1980. Norwich: Michael Russell, 1992.
Wynn, Wilton. Keepers of the Keys. New York: Random House, 1988.