Cita APA (7a ed.)

Vollaard, B. A. (2005). Police numbers up, crime rates down: The effect of police on crime in the Netherlands, 1996 - 2003. CPB document.

Cita Chicago Style (17a ed.)

Vollaard, Ben A. "Police Numbers Up, Crime Rates Down: The Effect of Police on Crime in the Netherlands, 1996 - 2003." CPB Document 2005.

Cita MLA (9a ed.)

Vollaard, Ben A. "Police Numbers Up, Crime Rates Down: The Effect of Police on Crime in the Netherlands, 1996 - 2003." CPB Document, 2005.