Ward, Russel
Oxford University Press, 1964
Buku Teks SO
Palmer, Vance
Currey O'Neill, 1966
Buku Teks SO
Hillenbrand, Laura
Ballantine Books, 2001
Buku Teks SO
Moncrieff, A.R. Hope
Gramercy, 1995
Buku Referensi
Metford, J.C.J.
Thames and Hudson, 1983
Buku Referensi