Mark A. Kishlansky，ed.， Sources of World History ，New York，Harper Collins，1995，pp. 298-302；http：//www.historyguide.org/europe/churchill.html. lOuvUqgatn4SUQmZhtRTPA0xu9xX8BkYts95N5GAMZE2zHTDpAUKeO+KjJ4mW7Jw
