Mark A. Kishlansky，ed.， Sources of World History ，New York，Harper Collins，1995，pp. 298-302；http：//www.historyguide.org/europe/churchill.html. /p+Z+i8YehNqfCE0WYD4eg4Ifm78iMZIGjGlQs05UetIC7cEzKNSJJv0O+Y6Xhrm
