Nygh, P. E. (Peter Edward)
Butterworth, 1978
Buku Teks
Bates, Frank
Law Book Co. , 1985
Buku Teks
Sendall, Jane
Oxford University press, 2014
Buku Teks
Romero, Flerida Ruth P.
U.P. Law Center, 1981
Buku Teks
Rodgers, M.E.
Blackstone Press Limited, 1998
Buku Referensi