Zeitlin, Irving M.
Polity Press, 2007
Buku Teks SO
Hollingsworth, T.H.
Cornell University Press, 1969
Buku Teks SO
Trevor-Roper, H.R.
New York Harper & Row 1957
Buku Teks SO
Shepperd, William R.
Barnes and Noble, 1959
Buku Referensi
Australia : Department of History University of Melbourne
Majalah, Jurnal, Buletin