Cita APA (7a ed.)

LaFree, G., Curtis, K., & McDowall, D. (2015). How effective are our 'better angels'?: Assessing country-level declines in homicide since 1950. European journal of criminology, 12(4), 482-504.

Cita Chicago Style (17a ed.)

LaFree, Gary, Karise Curtis, y David McDowall. "How Effective Are Our 'Better Angels'?: Assessing Country-level Declines in Homicide Since 1950." European Journal of Criminology 12, no. 4 (2015): 482-504.

Cita MLA (9a ed.)

LaFree, Gary, et al. "How Effective Are Our 'Better Angels'?: Assessing Country-level Declines in Homicide Since 1950." European Journal of Criminology, vol. 12, no. 4, 2015, pp. 482-504.