Cita APA (7a ed.)

Knickerbocker, H. R. (1942). Is tomorrow Hitler's?: 115 questions on the battle of mankind. Penguin Books.

Cita Chicago Style (17a ed.)

Knickerbocker, H. R. Is Tomorrow Hitler's?: 115 Questions on the Battle of Mankind. Harmondsworth, Eng.: Penguin Books, 1942.

Cita MLA (8a ed.)

Knickerbocker, H. R. Is Tomorrow Hitler's?: 115 Questions on the Battle of Mankind. Penguin Books, 1942.