8Robert Putnam.Diplomacy and Domestic Politics:The Logic of Two-level Games[J].International Organization,1988(3).
9American State Department.Doc.252,Memorandum of a Briefing by Director of Central Intelligence McCone,Jun29,1967,FRUS,1964—1968,Vol.XXXIV[EB/OL].http://www.state.gov/www/about_state/history/vol_xxxiv/z.html,2004-12-15.