Dixson, Robert J.
Regents Publishing, 1981
Buku Referensi
Wood, Frederick T.
Macmillan, 1995
Buku Referensi
compiled and translated by Ismail Mazhar
The Renaissance Bookshop, 1950
Buku Referensi
Moon, Rousamund
Clarendon Press, 1998
Buku Teks
Spears, Richard A.
Erlangga, 1999
Buku Referensi