Giddings, F. H, (1898), Introduction to Proal’s Political crime, New York.
Grey, Elizabeth, (1968), the story of Journalism, Longmans young Books, London.
Hagan, F.E, (1997), Political crime: Ideology and Criminality, Boston: Allyn and Bacon.
Ingraham, Barton. L, (1979), Political Crime in Europe, Univercity of California Press, U.S.A.
Murphy, J.F,(1985), Punishing International Terrorists, USA, Rowman & Allanheld Publisher.
Proal, s, Political Crime (Reprint ed.), (1973), Montclair, NJ: Paterson Smith. (original work Published 1898) .
Terrou, Fernand and Solal, Lucien, (1972), Legislation for Press, Film and radio, Arno press ,New York.