I am giving the ranking of B Schools abroad given by The Economist for the year 2012. GO through it. Here is the list. The name of the B school and the country is give for your reference.

Chicago, University of - Booth School of Business, United States
Dartmouth College - Tuck School of Business, United States
Virginia, University of - Darden Graduate School of Business Administration, United States
Harvard Business School, United States
Columbia Business School, United States
California at Berkeley, University of - Haas School of Business, United States
Massachusetts Institute of Technology – MIT Sloan School of Management, United States
Stanford Graduate School of Business, United States
IESE Business School - University of Navarra, Spain
IMD - International Institute for Management Development, Switzerland