APA (7th ed.) Citation

Lewis, B. (2017). Keep calm and carry on: The truth behind the poster. Imperial War Museums.

Chicago Style (17th ed.) Citation

Lewis, Bex. Keep Calm and Carry on: The Truth Behind the Poster. London: Imperial War Museums, 2017.

MLA (9th ed.) Citation

Lewis, Bex. Keep Calm and Carry on: The Truth Behind the Poster. Imperial War Museums, 2017.

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