Christie, Agatha, 1890-1976, author
Gramedia Pustaka Utama, 2014
Buku Teks
Zeitlin, Irving M., author
Polity Press, 2007
Buku Teks
Trevor-Roper, H.R.
New York Harper & Row 1957
Buku Teks
Shepperd, William R., author
Barnes and Noble, 1959
Buku Referensi
Australia : Department of History University of Melbourne
Majalah, Jurnal, Buletin