Encyclopaedia Britannica Online

International Encyclopedia of the Social Science C61/Si35.2(v.1-9) 2008

International Studies Encyclopedia D81-61/In8d(V.1-12) 2010

Wikipedia and academic use 
The Cambridge History of American Foreign Relations Volume 1: The Creation of a Republican Empire, 1776–1865

Encyclopedia of American Foreign Policy - D871.20/En19.2(v.1-3) 2002

Encyclopedia of U.S. Foreign Relations D871.2-61/En19(GG) 1997

The encyclopedia of the Cold War [electronic resource] : a political, social, and military history Online

Encyclopedia of the Cold War  D815-61/En19d 2008

International security and the United States: an encyclopedia – Online

Historical Encyclopedia of U.S. Presidential Use of Force, 1789-2000  D771.29-61/H629

The Cold War, 1945-1991.  D815/D658.2  2006

Dictionary of American Diplomatic History  D871.29/F493.2(GG) 1989