APA (7th ed.) Citation

Eck, J. E., & Spelman, W. (1987). Problem-solving: Problem-oriented policing in Newport news. Police Executive Research Forum [u.a.].

Chicago Style (17th ed.) Citation

Eck, John E., and William Spelman. Problem-solving: Problem-oriented Policing in Newport News. Washington, DC: Police Executive Research Forum [u.a.], 1987.

MLA (9th ed.) Citation

Eck, John E., and William Spelman. Problem-solving: Problem-oriented Policing in Newport News. Police Executive Research Forum [u.a.], 1987.