Cita APA

Walker, S., & Katz, C. M. (2005). The police in America (5th ed.). New York: McGraw-Hill.

Chicago Style Citation

Walker, Samuel., i Charles M. Katz. The Police in America. 5th ed. New York: McGraw-Hill, 2005.

Cita MLA

Walker, Samuel., i Charles M. Katz. The Police in America. 5th ed. New York: McGraw-Hill, 2005.