APA (7th ed.) Citation

Waugh, E. (1943). Put out more flags. Penguin Books.

Chicago Style (17th ed.) Citation

Waugh, Evelyn. Put Out More Flags. [Hardmondsworth, England] ; Baltimore: Penguin Books, 1943.

MLA (9th ed.) Citation

Waugh, Evelyn. Put Out More Flags. Penguin Books, 1943.