Hanbury, Harold Grenville, author
Stevens & Sons, 1981
Buku Teks
Vickery, B.G.
The Donnington Press, 1931
Buku Teks
Levy, Hermann
Macmillan, 1927
Buku Teks
Arnaud, A. A.
Woodhead-Faulkner, 1985
Buku Teks
Sydenham, Angela, author
Sweet & Maxwell, 2000
Buku Teks