Mark A. Kishlansky，ed.， Sources of World History ，New York，Harper Collins，1995，pp. 298-302；http：//www.historyguide.org/europe/churchill.html. 2qCC7enI1/IJfDEfENgdTLS8yAgBzb24RRajZ4NbGbFwE25iLrX1mVhK1TlWGN/6
