Mark A. Kishlansky，ed.， Sources of World History ，New York，Harper Collins，1995，pp. 298-302；http：//www.historyguide.org/europe/churchill.html. 3zM5/bSmMKCXtx59+vvnWFvfyJRVbLxsrLWHdJNYYPP+FVeF62zP/b/UXxj/KWvl
