Tim Dunne
Oxford University Press, 2010
Buku Teks
Edited by Tim Dunne, Milja Kurki, Steve Smith
Oxford University Press, 2016
Buku Teks
Jones, Walter S.
Harper Collins , 1991
Buku Teks
Knutsen, Torbjorn L.
Manchester University Press, 1992
Buku Teks
Said, Abdul Aziz, author
Prentice-Hall, 1995
Buku Teks