APA (7th ed.) Citation

Wortley, R., & Smallbone, S. (2006). Child pornography on the internet. Problem-oriented guides for police / Problem-specific guides series.

Chicago Style (17th ed.) Citation

Wortley, Richard, and Stephen Smallbone. "Child Pornography on the Internet." Problem-oriented Guides for Police / Problem-specific Guides Series 2006.

MLA (9th ed.) Citation

Wortley, Richard, and Stephen Smallbone. "Child Pornography on the Internet." Problem-oriented Guides for Police / Problem-specific Guides Series, 2006.