Mark A. Kishlansky，ed.， Sources of World History ，New York，Harper Collins，1995，pp. 298-302；http：//www.historyguide.org/europe/churchill.html. dxKGN9ATGCfGYFfSXuGRugB49b7fUX/pXpQY+8R8rrn8s3JdgnjhDqPvU1HR35zh
