Davis, Howard
Butterworth, 1991
Buku Teks
Holdcroft, David
Butterworth, 1991
Buku Teks
Davies, Howard, author
Butterworth, 1991
Buku Teks
Paton, George Whitecross
The Clarendon Press, 1953
Buku Teks
A. Yusuf Ali, author
Amana Corp., 1983
Buku Referensi