APA (7th ed.) Citation

Koerver, H. J. (2020). The Kaiser's U-boat assault on America. Pen & Sword Military.

Chicago Style (17th ed.) Citation

Koerver, Hans Joachim. The Kaiser's U-boat Assault on America. Barnsley: Pen & Sword Military, 2020.

MLA (9th ed.) Citation

Koerver, Hans Joachim. The Kaiser's U-boat Assault on America. Pen & Sword Military, 2020.