APA (7th ed.) Citation

(2003). Secret intelligence in the twentieth century (1. publ.). Cass.

Chicago Style (17th ed.) Citation

Secret Intelligence in the Twentieth Century. 1. publ. London [u.a.]: Cass, 2003.

MLA (9th ed.) Citation

Secret Intelligence in the Twentieth Century. 1. publ. Cass, 2003.