InfoUSA : information USA
US. Department of State, 2005
 Multimedia
Dixson, Robert J., author
The U.S.A.- : the land and the people
Regents Publishing, 1959
 Buku Teks
Kislov, A., author
USA and the islamic world
Sterling Publishers Private, 1984
 Buku Teks
Tuchman, Barbara W., author
The proud tower : a portrait of the world before the war 1890-1914
Macmillan, 1965
 Buku Teks
Manchester, William, author
A Rockefeller family portrait from John D. to Nelson
Little, Brown, 1959
 Buku Teks
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