Cita APA (7a ed.)

Evans, W. N., & Owens, E. (2007). COPS and crime. Journal of public economics, 91, 181-201. doi:10.1016/j.jpubeco.2006.05.014

Cita Chicago Style (17a ed.)

Evans, William N., y Emily Owens. "COPS and Crime." Journal of Public Economics 91 (2007): 181-201. https://doi.org/10.1016/j.jpubeco.2006.05.014.

Cita MLA (9a ed.)

Evans, William N., y Emily Owens. "COPS and Crime." Journal of Public Economics, vol. 91, 2007, pp. 181-201, https://doi.org/10.1016/j.jpubeco.2006.05.014.