Cita APA (7a ed.)

Jones, T., & Newburn, T. (2001). Widening access: Improving police relations with hard to reach groups Police research series.

Cita Chicago Style (17a ed.)

Jones, Trevor, y Tim Newburn. "Widening Access: Improving Police Relations with Hard to Reach Groups." Police Research Series 2001.

Cita MLA (9a ed.)

Jones, Trevor, y Tim Newburn. "Widening Access: Improving Police Relations with Hard to Reach Groups." Police Research Series, 2001.