Churchill, W., & Gilbert, M. (2007). The World Crisis: 1911-1918 (abridged and revised ed. with an additional chapter on the Battle of the Marne.). New York [etc.]: Penguin books.

Churchill, Winston, and Martin Gilbert. The World Crisis: 1911-1918. abridged and revised ed. with an additional chapter on the Battle of the Marne. New York [etc.]: Penguin books, 2007.

Churchill, Winston, and Martin Gilbert. The World Crisis: 1911-1918. abridged and revised ed. with an additional chapter on the Battle of the Marne. New York [etc.]: Penguin books, 2007.