Bonell, Michael
Transnational Juris Publications, 1994
Buku Teks
Mill, John Stuart
David Campbell Publisher, 1992
Buku Referensi
Handlin, Oscar
Atheneum, 1966
Buku Teks SO
Walker, Marianne McGettigan
American law Institute Publishers, 1995
Buku Teks
King, Jeff, 1973-
Cambridge University Press, 2016
Buku Teks SO