APA (7th ed.) Citation

Blake, C., Sheldon, B., & Williams, P. (2010). Policing and criminal justice. Learning Matters.

Chicago Style (17th ed.) Citation

Blake, Christopher, Barrie Sheldon, and Peter Williams. Policing and Criminal Justice. Exeter: Learning Matters, 2010.

MLA (9th ed.) Citation

Blake, Christopher, et al. Policing and Criminal Justice. Learning Matters, 2010.