ISBN 0-86491-157-2
Webster, C. D., Douglas, K. S., Eaves, D., & Hart, S. D. (1997). HCR-20: Assessing risk for violence (Version 2). Burnaby, BC: Simon Fraser University, Mental Health, Law, and Policy Institute.
The HCR-20 (Version 2) provides a structure for evaluating risk of violence.