Rickard, John David
Australian National University Press, 1976
Buku Teks SO
Hirst, J.B.
George Allen and Unwin, 1983
Buku Teks SO
Schwyzer, Philip
Cambridge University Press, 2009
eBooks
Carvan, John
The Law Book Company Limited, 1995
Buku Teks
Parker, R.S.
Prentice Hall International, 1978
Buku Teks SO