Carr, Robert K.
American democracy in theory and practice : essentials of national, state, and local government
Rinehart, 1957
 Buku Teks
American democracy in theory and practice: national, state and local government
by Robert K. Carr ... [and others]
Holt, Rinehart and Winston, 1961
 Buku Teks SO
Friedrich, Carl J.
Constitutional government and democracy theory and practice in Europe and America
Blaisdell, 1949
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Friedrich, Carl J.
Constitutional government and democracy : theory and practice in Europe and America
Ginn, 1950
 Buku Teks
Geer, John Gray
Gateways to democracy: an introduction to American government
Wadsworth and Cengage Learning, 2012
 Buku Teks SO