Charles Webster
Open University Press, 2001
Buku Teks
edited by Ian Peate, Lisa Whiting
John Wiley & Sons, 2006
Buku Teks
Ball, Jane W., author
Pearson Education , 2003
Buku Teks
Milan, Kundera, author
Mimeumsa, 2007
Buku Teks
Jan Klabbers.
Cambridge University Press, 2016
Buku Teks