APA (7th ed.) Citation

Richelson, J. T. (1997). 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. Oxford: Oxford University Press, 1997.

MLA (9th ed.) Citation

Richelson, Jeffrey T. A Century of Spies: Intelligence in the Twentieth Century. Oxford University Press, 1997.