Collins, David, author
Cambridge University Press, 2017
Buku Teks
Balaam, David N., 1950-, author
Pearson/Prentice Hall, 2005
Buku Teks
Schabas, William A., author
Cambridge University Press, 2011
Buku Teks
Klabbers, Jan, author
Cambridge University Press, 2002
Buku Teks
Reynolds, P.A., author
Longman, 1994
Buku Teks