Showell, J. P. M. (1989). U-Boat Command and the Battle of the Atlantic. Conway Maritime.
Chicago Style (17th ed.) CitationShowell, Jak P. Mallmann. U-Boat Command and the Battle of the Atlantic. London: Conway Maritime, 1989.
MLA (9th ed.) CitationShowell, Jak P. Mallmann. U-Boat Command and the Battle of the Atlantic. Conway Maritime, 1989.
Warning: These citations may not always be 100% accurate.