APA (7th ed.) Citation

Williamson, G. (2020). U-boats at war in 100 objects, 1939-1945. Frontline Books.

Chicago Style (17th ed.) Citation

Williamson, Gordon. U-boats at War in 100 Objects, 1939-1945. Barnsley, South Yorkshire, UK: Frontline Books, 2020.

MLA (9th ed.) Citation

Williamson, Gordon. U-boats at War in 100 Objects, 1939-1945. Frontline Books, 2020.

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