Mark A. Kishlansky，ed.， Sources of World History ，New York，Harper Collins，1995，pp. 298-302；http：//www.historyguide.org/europe/churchill.html. 9OtqQCSz9zuAxf7QQU3+85FY9dLlmBsNm93I7YkndszeKBv4BH4/2kbOyB9YvbLK
