Cita APA (7a ed.)

Harries, K. D. (1990). Geographic factors in policing. Police Executive Research Forum.

Cita Chicago Style (17a ed.)

Harries, Keith D. Geographic Factors in Policing. Washington, DC: Police Executive Research Forum, 1990.

Cita MLA (9a ed.)

Harries, Keith D. Geographic Factors in Policing. Police Executive Research Forum, 1990.