Jennings, W. G., Donner, C. M., Maskály, J., & Khey, D. N. (2011). Evaluating the relationship between law enforcement and school security measures and violent crime in schools. Journal of police crisis negotiations, 11(2), 109-124. doi:10.1080/15332586.2011.581511
Cita Chicago Style (17a ed.)Jennings, Wesley G., Christopher M. Donner, Jon Maskály, y David N. Khey. "Evaluating the Relationship Between Law Enforcement and School Security Measures and Violent Crime in Schools." Journal of Police Crisis Negotiations 11, no. 2 (2011): 109-124. https://doi.org/10.1080/15332586.2011.581511.
Cita MLA (9a ed.)Jennings, Wesley G., et al. "Evaluating the Relationship Between Law Enforcement and School Security Measures and Violent Crime in Schools." Journal of Police Crisis Negotiations, vol. 11, no. 2, 2011, pp. 109-124, https://doi.org/10.1080/15332586.2011.581511.