Cita APA (7a ed.)

Machin, S., & Marie, O. (2005). Crime and police resources: The street crime initiative.

Cita Chicago Style (17a ed.)

Machin, Stephen, y Olivier Marie. Crime and Police Resources: The Street Crime Initiative. 2005.

Cita MLA (9a ed.)

Machin, Stephen, y Olivier Marie. Crime and Police Resources: The Street Crime Initiative. 2005.