APA (7th ed.) Citation

Von der Porten, E. P. (1970). The German Navy in World War II. Barker.

Chicago Style (17th ed.) Citation

Von der Porten, Edward P. The German Navy in World War II. London: Barker, 1970.

MLA (9th ed.) Citation

Von der Porten, Edward P. The German Navy in World War II. Barker, 1970.

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