Hugh L.Evans M.A.
Sweet and Maxwell, 1997
Buku Teks
Vanderbilt University Press, 1960
Buku Teks
Smith, J. C.
Carsel Legal Publications, 1984
Buku Teks
Lawson, F.H., author
Clarendon Press, 1955
Buku Teks
Powell, Jim
Writers and readers Publishing, 1997
Buku Teks