APA (7th ed.) Citation

Simms, B. (2019). Hitler: Only the world was enough. Allen Lane, an imprint of Penguin Books.

Chicago Style (17th ed.) Citation

Simms, Brendan. Hitler: Only the World Was Enough. [London]: Allen Lane, an imprint of Penguin Books, 2019.

MLA (8th ed.) Citation

Simms, Brendan. Hitler: Only the World Was Enough. Allen Lane, an imprint of Penguin Books, 2019.