Healey, Bede
Georgian House, 1972
Buku Teks
Nicholson, D.F.
F.W. Cheshire, 1955
Buku Teks
Rose, Dennis J.
The L:aw Book Company Limited, 1978
Buku Teks
Corones, S. G.
Thomson Reuters, 2009
Buku Teks
Finn, Paul
Oxford University Press, 1987
Buku Referensi