Hoffman, Frederick J.
The twenties : American writing in the Postwar decade / Frederick J. Hoffman
The Free Press, 1962
 Buku Teks
McConnell, Grant
Private power and American democracy
Alfred A. Knopf, 1967
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Lake, Anthony
6 nightmares : real threats in a dangerous world and how America can meet them
Little, Brown and Company, 2000
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Galbraith, John Kenneth, 1908-2006
American capitalism : the concept of countevailing power
Houghton Miffiln, 1952
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Dolbeare, Kenneth M.
American politics : policies, power, and change
D.C. Heath, 1985
 Buku Teks