APA (7th ed.) Citation

Verlinden, S., Hersen, M., & Thomas, J. (2000). Risk factors in school shootings. Clinical psychology review, 20(1), 3-56.

Chicago Style (17th ed.) Citation

Verlinden, S., M. Hersen, and J. Thomas. "Risk Factors in School Shootings." Clinical Psychology Review 20, no. 1 (2000): 3-56.

MLA (8th ed.) Citation

Verlinden, S., et al. "Risk Factors in School Shootings." Clinical Psychology Review, vol. 20, no. 1, 2000, pp. 3-56.