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East, West, North, South: Major Developments in International Politics 1945-1986, (Norwegian University Press, 1986, revised ed., 1991, 3rd ed., 1997, 4th ed., 1999, 5th ed., 2005).
The American "Empire" and Other Studies of US Foreign Policy in a Comparative Perspective, (Oxford University Press, 1990).
"Empire" by Integration: the United States and European Integration, 1945-1997, (Oxford University Press, 1998).