APA (7th ed.) Citation

Richelson, J. T. (1995). A century of spies: Intelligence in the twentieth century. Oxford University Press.

Chicago Style (17th ed.) Citation

Richelson, Jeffrey T. A Century of Spies: Intelligence in the Twentieth Century. New York [u.a.]: Oxford University Press, 1995.

MLA (8th ed.) Citation

Richelson, Jeffrey T. A Century of Spies: Intelligence in the Twentieth Century. Oxford University Press, 1995.