Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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