Gibbon, Edward
J.MDent & Sons, 1957
Buku Teks
Davies, Ioan
Routledge, 1995
Buku Teks
Vasiliev, A. A.
University of Wisconsin Press, 1952
Buku Teks
Hussain, Shahanara
Asiatic Society of Pakistan, 1968
Buku Teks
Hay, Denys
London Methuen & Co 1953
Buku Teks