Harlow, Ralph Volney, author
Story of America
Holt, Rinehart and Winston,Inc, 1964
 Buku Teks
Tocqueville, Alexis De, author
Democracy in America
Vintage Books, 1956
 Buku Teks
Harper, Donald Victor
Transportation in America
Prentice-Hall, 1982
 Buku Teks
Sitkoff, Harvard, author
Postwar America
Oxford University Press, 2000
 Buku Teks
Allen, Harry E.
Corrections in America
Macmillan Publishing Company, 1989
 Buku Teks
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