3Hughs D. Graham and Ted R. Gurr , Violence in America , Historical and Comparative Perspectives : A Report to the National Commission on the Causes and Prevention of Violence (Washington D. C. , Government Printing Office , 1969, Vol. 1) 41. 被引量：1
4Toni Morrison, Song of Solomon (NY: Penguin Books, 1977) 101. 被引量：1
