Books
Warburton, Nigel (2009) Free Speech: A Very Short Introduction. Oxford University Press
Zeno-Zencovich, Vincenzo (2008) Freedom of Expression: A Critical and Comparative Analysis. Routledge: Cavendish
Kierulf, Anine og Helge R?nning (2009) Freedom of Speech Abridged? Cultural, Legal and Philosophical Challenges. Nordicom