Paterson, Matthew
Palgrave, 2001
Buku Teks
edited by Jan Klabbers, Touko Piiparinen
Cambridge University Press, 2013
Buku Teks
Ray, James Lee
Houghton Mifflin, 1987
Buku Teks
Kaarbo, Juliet
Wadsworth, Cengage Learning, 2011
Buku Teks
Cambridge University Press, 2003
Buku Teks