Paris, Roland
Cambridge University Press, 2004
Buku Teks
edited by Charles Webel and Jorgen Johansen
Routledge, 2012
Buku Teks
Oberschall, Anthony
Routledge , 1997
Buku Teks
edited by David Bloomfield, Teresa Barnes, and Luc Huyse ; contributors, David Bloomfield [and others]
International IDEA, 2003
Buku Teks
Hayner, Priscilla B.
Routledge, Taylor & Francis Group, 2018
Buku Teks