Ellison, G., & Smyth, J. (2000). The crowned harp: Policing Northern Ireland. Pluto Press.

Ellison, Graham, and Jim Smyth. The Crowned Harp: Policing Northern Ireland. London ; Sterling, Va.: Pluto Press, 2000.

Ellison, Graham, and Jim Smyth. The Crowned Harp: Policing Northern Ireland. Pluto Press, 2000.