APA (7th ed.) Citation

Churchill, W. S. (1964). The World Crisis 1911-1918 (3. Aufl.). Four Square Books.

Chicago Style (17th ed.) Citation

Churchill, Winston S. The World Crisis 1911-1918. 3. Aufl. London: Four Square Books, 1964.

MLA (8th ed.) Citation

Churchill, Winston S. The World Crisis 1911-1918. 3. Aufl. Four Square Books, 1964.