Cita APA (7a ed.)

Barton, A., & Evans, R. (1999). Proactive policing on Merseyside. Police research series.

Cita Chicago Style (17a ed.)

Barton, Alana, y Roger Evans. "Proactive Policing on Merseyside." Police Research Series 1999.

Cita MLA (8a ed.)

Barton, Alana, y Roger Evans. "Proactive Policing on Merseyside." Police Research Series, 1999.