Beatson, J.
Claredon Press, 1983
Buku Teks
Marston, John
Pitman, 1993
Buku Teks
Dine, Janet, author
Blackstone Press, 1993
Buku Teks
Dine, Janet, author
Blackstone Press, 1998
Buku Referensi
Keir, D. L. (David Lindsay), author
Oxford University Press, 1948
Buku Teks