APA (7th ed.) Citation

Spelman, W., & Eck, J. E. (1987). Problem-oriented policing. U.S. Dept. of Justice, National Institute of Justice.

Chicago Style (17th ed.) Citation

Spelman, William, and John E. Eck. Problem-oriented Policing. [Washington, D.C.]: U.S. Dept. of Justice, National Institute of Justice, 1987.

MLA (9th ed.) Citation

Spelman, William, and John E. Eck. Problem-oriented Policing. U.S. Dept. of Justice, National Institute of Justice, 1987.