Baalman, John
The Law Book Co, 1955
Buku Teks
Crowford, J. G.
Australian National University Press, 1968
Buku Teks SO
Freeland, John Maxwell, 1920-
F.W. Cheshire, 1968
Buku Teks SO
Scott, Ernest
Oxford University Press, 1953
Buku Teks
edited by Gordon Greenwood
Angus and Robertson, 1955
Buku Teks SO