Cita APA

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

Citación estilo Chicago

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

Cita MLA

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