APA (7th ed.) Citation

Dickinson, R. E. (1943). The German lebensraum. Penguin Books.

Chicago Style (17th ed.) Citation

Dickinson, Robert Eric. The German Lebensraum. Harmondsworth, Eng.: Penguin Books, 1943.

MLA (8th ed.) Citation

Dickinson, Robert Eric. The German Lebensraum. Penguin Books, 1943.