APA (7th ed.) Citation

Cannadine, D. (2018). George V: The unexpected king (First published in Penguin Books.). Penguin Books.

Chicago Style (17th ed.) Citation

Cannadine, David. George V: The Unexpected King. First published in Penguin Books. UK: Penguin Books, 2018.

MLA (9th ed.) Citation

Cannadine, David. George V: The Unexpected King. First published in Penguin Books. Penguin Books, 2018.