Laski, Harold J., author
The American democracy a commentary and interpretation
George Allen and Unwin, 1949
 Buku Teks
Patterson, Thomas E., author
The American democracy
McGraw-Hill, 203
 Buku Teks
Population and the American future : the report of the commission on population growth and the American future.
New American Library, 1972
 Buku Teks
Kraus, Michael, author
The writing of American history
University of Oklahoma Press, 1953
 Buku Teks
Hofstadler, Richard, author
The American Republic; Vol.1
Prentice-Hall, 1895
 Buku Teks
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