Mark A. Kishlansky，ed.， Sources of World History ，New York，Harper Collins，1995，pp. 298-302；http：//www.historyguide.org/europe/churchill.html. g4/rpVteZNDbuzfOYe5AohpMvy7c8YXI0aoqWfwsITjr2DL6RdT7cKzfKEj1gRHQ
