Rae, John B.
Mc Graw-Hill Book Company, 1949
Buku Teks
Risjord, Norman K., author
Prentice-Hall, 1985
Buku Teks
Zinn, Howard, author
HarperCollins Publishers, 2005
Buku Teks
Williams, T. Harry, author
Alfred A. Knopf, 1963
Buku Teks
Beard, Charles A., author
New Home Library, 1944
Buku Teks