Cita APA (7a ed.)

Birzer, M. L., & Roberson, C. (2007). Policing today and tomorrow. Pearson/Prentice Hall.

Cita Chicago Style (17a ed.)

Birzer, Michael L., y Cliff Roberson. Policing Today and Tomorrow. Upper Saddle River, NJ: Pearson/Prentice Hall, 2007.

Cita MLA (8a ed.)

Birzer, Michael L., y Cliff Roberson. Policing Today and Tomorrow. Pearson/Prentice Hall, 2007.