Cita APA (7a ed.)

Tilley, N. (1992). Safer cities and community safety strategies Crime Prevention Unit series.

Cita Chicago Style (17a ed.)

Tilley, Nick. "Safer Cities and Community Safety Strategies." Crime Prevention Unit Series 1992.

Cita MLA (8a ed.)

Tilley, Nick. "Safer Cities and Community Safety Strategies." Crime Prevention Unit Series, 1992.