Mark A. Kishlansky，ed.， Sources of World History ，New York，Harper Collins，1995，pp. 298-302；http：//www.historyguide.org/europe/churchill.html. gOAJGOqFhJP9H4Z3dH+qMEQTZHatMRdkuQCvn3uZTidrwl4p/KlS2SLaSk0KQgTr
