Jeong, How-Won, author
Ashgate, 2000
Buku Teks
Christie, Daniel J., author
Prentice-Hall, 2001
Buku Teks
edited by Charles Webel and Jorgen Johansen
Routledge, 2012
Buku Teks
Blumberg, Herbert H., author
Cambridge University Press , 2006
Buku Teks
Wallensteen, Peter, author
Sage, 2002
Buku Teks