Lloyd, Dennis, author
Frederick A. Praeger, 1959
Buku Teks
Lloyd, Lord, author
Stevens & Sons, 1979
Buku Teks
Bentham, Jeremy, author
Columbia University Press, 1945
Buku Teks
Davies, Howard, author
Butterworth, 1991
Buku Teks
Zweigert, Konrad, author
Clarendon Press, 1998
Buku Teks