Smith, John Cyril
Butterworth, 1992
Buku Teks
Curzon, L.B.
Pitman, 1994
Buku Teks
Morawetz, Tom
Ashgate, 2000
Buku Teks
Gardner, Thomas J., 1800-1850
Wadsworth and Cengage Learning, 2012
Buku Teks
edited by Koh Kheng Lian
Faculty of Law University of Singapore, 1977
Buku Teks SO