〔4〕J ohn Vasquez , eds , Classics of International Relations , 3rd ed. ,New Jersey : Prentice2Hall ,1996 ,p . 10.
〔5〕Paul Viotti & Mark Kauppi , International Relations Theory : Realism , Pluralism , Globalism , 2nd. ed. , New York : the Macmillan Company ,1993 , p . 38.