Geer, John Gray
Gateways to democracy: an introduction to American government
Wadsworth and Cengage Learning, 2012
 Buku Teks
Gateways to democracy : an introduction to American government : the essentials
by John G. Geer [and others]
Wadsworth and Cengage Learning, 2012
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American government
by Susan Welch ... [and others]
Thomson, 2006
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Sayre, Wallace S.
American government
Barnes & Noble, 1964
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Posey, Rollin Bennett
American government
Littlefield, Adam, 1958
 Buku Teks