Kendall, Willmoore
The basic symbols of the American political tradition
Louisiana University Press, 1970
 Buku Teks SO
Cummings, Milton C.
Democracy under pressure: an introduction to the American political system
Harcourt Brace Jovanovich, 1977
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Cummings, Milton C.
Democracy under pressure: an introduction to the American political system
Harcourt Brace Jovanovich, 1981
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Plano, Jack C.
The American political dictionary
Holt, Rinehart and Winston, 1985
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Sayre, Wallace S.
American government
Barnes & Noble, 1964
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