APA (7th ed.) Citation

Von der Porten, E. P. (1969). The German Navy in World War Two. Ballantine books.

Chicago Style (17th ed.) Citation

Von der Porten, Edward P. The German Navy in World War Two. New York: Ballantine books, 1969.

MLA (9th ed.) Citation

Von der Porten, Edward P. The German Navy in World War Two. Ballantine books, 1969.

Warning: These citations may not always be 100% accurate.