Drucker, Peter Ferdinand, 1909-2005
Men, ideas and politics
Harper Colophan Books, 1977
 Buku Teks
Hill, Christopher
The changing politics of foreign policy
Palbrave Macmillan, 2003
 Buku Teks
Simmons, James C.
Americans
Harmony Books, 1990
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Oliveira, A. Ramos
Politics, economics and men of modern Spain
Victor Gollancz Ltd., 1946
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Duchacek, Ivo D.
Nations and Men: an introduction to international politics
Dryden Press, 1971
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