Ketchum, Richard M.
American Heritage Publishing, 1960
Buku Teks
Catton, Bruce
Dell Publishing, 1960
Buku Teks
W.H. Freeman and Company, 1993
Buku Teks
Kuykendall, Ralph S.
Prentice-Hall, 1961
Buku Teks
Franklin, John Hope
Alfred A.Knopf, 1961
Buku Teks