James, William
Meridian Books , 1959
Buku Teks
Grousset, Rene
Paris Plon 1954
Buku Teks
Marrou, Henri-Irenee
Paris Du Seuil 1954
Buku Teks
Trevor-Roper, H.R.
New York Harper & Row 1957
Buku Teks
Philadelphia : Current History Inc.
Majalah, Jurnal, Buletin