Cita APA (7a ed.)

Hirschfeld, W., & Brooks, G. (1996). Hirschfeld: The story of a U-boat NCO 1940-1946. Naval Institute Press.

Cita Chicago Style (17a ed.)

Hirschfeld, Wolfgang, y Geoffrey Brooks. Hirschfeld: The Story of a U-boat NCO 1940-1946. Annapolis: Naval Institute Press, 1996.

Cita MLA (9a ed.)

Hirschfeld, Wolfgang, y Geoffrey Brooks. Hirschfeld: The Story of a U-boat NCO 1940-1946. Naval Institute Press, 1996.