APA-referens (7:e uppl.)
Messimer, D. R. (2015). The Baltimore Sabotage Cell: German agents, American traitors, and the U-boat Deutschland during World War I. Naval Institute Press.
Chicago-referens (17:e uppl.)
Messimer, Dwight R. The Baltimore Sabotage Cell: German Agents, American Traitors, and the U-boat Deutschland During World War I. Annapolis, Maryland: Naval Institute Press, 2015.
MLA-referens (9:e uppl.)
Messimer, Dwight R. The Baltimore Sabotage Cell: German Agents, American Traitors, and the U-boat Deutschland During World War I. Naval Institute Press, 2015.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.