Beck, Ulrich, author
Malden, MA :Polity Press, 2005
Buku Teks
Paehlke, Robert C., author
MIT Press, 2003
Buku Teks
Gill, Stephen, author
John Hopkins University Press, 1988
Buku Teks
Cohn, Theodore H., author
Longman, 2003
Buku Teks
edited by Michael Stohl and Harry R. Targ
Schenkman Publishing Company, 1982
Buku Teks