APA (7th ed.) Citation

Boghardt, T. (2004). Spies of the Kaiser: German covert operations in Great Britain during the first World War era. Palgrave Macmillan.

Chicago Style (17th ed.) Citation

Boghardt, Thomas. Spies of the Kaiser: German Covert Operations in Great Britain During the First World War Era. Basingstoke [u.a.]: Palgrave Macmillan, 2004.

MLA (9th ed.) Citation

Boghardt, Thomas. Spies of the Kaiser: German Covert Operations in Great Britain During the First World War Era. Palgrave Macmillan, 2004.