APA (7th ed.) Citation

Bungert, H. (2003). Secret intelligence in the twentieth century. Cass.

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

Bungert, Heike. Secret Intelligence in the Twentieth Century. Cass, 2003.