Huntington, Samuel P., author
American politics
The Belknap Press, 1981
 Buku Teks
Morris, Richard B., author
The American revolution
Van Nostrand Reinhold, 1955
 Buku Teks
Unesco Chronicle
Paris : Unesco Coupon
 Majalah, Jurnal, Buletin
Raeburn, Michael, author
The chronicle of opera
Thames and Hudson, 1998
 Buku Referensi
Laski, Harold J., author
The American democracy a commentary and interpretation
George Allen and Unwin, 1949
 Buku Teks
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