Cita APA (7a ed.)

Smith, D. J., & Gray, J. J. (1985). Police and people in London: The PSI report. Gower.

Cita Chicago Style (17a ed.)

Smith, David John, y Jeremy J. Gray. Police and People in London: The PSI Report. Aldershot [u.a.]: Gower, 1985.

Cita MLA (8a ed.)

Smith, David John, y Jeremy J. Gray. Police and People in London: The PSI Report. Gower, 1985.