APA (7th ed.) Citation

Churchill, W., & Churchill, W. (1962). The gathering storm. Penguin Books.

Chicago Style (17th ed.) Citation

Churchill, Winston, and Winston Churchill. The Gathering Storm. Harmondswort: Penguin Books, 1962.

MLA (9th ed.) Citation

Churchill, Winston, and Winston Churchill. The Gathering Storm. Penguin Books, 1962.

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