Schmitthoff, Clive M., author
Stevens and Sons Limited, 1975
Buku Teks
Schmitthoff, Clive M., author
Stevens & Sons, 1990
Buku Teks
Coombes, Davies, M., 1956-
E. & F.N. Spon , 1989
Buku Teks
Markanda, P.C., author
Lexis Nexis , 2001
Buku Teks
edited by Donald Harris and Denis Tallon
Clarendon Press, 1989
Buku Teks