APA   Click to copy
Testa, A., Young, J. K., & Mullins, C. (2017). Does democracy enhance or reduce lethal violence? Examining the role of the rule of law. Homicide Studies, 21, 219–239.

Chicago/Turabian   Click to copy
Testa, Alexander, Joseph K Young, and Christopher Mullins. “Does Democracy Enhance or Reduce Lethal Violence? Examining the Role of the Rule of Law.” Homicide Studies 21 (2017): 219–239.

MLA   Click to copy
Testa, Alexander, et al. “Does Democracy Enhance or Reduce Lethal Violence? Examining the Role of the Rule of Law.” Homicide Studies, vol. 21, SAGE Publications Sage CA: Los Angeles, CA, 2017, pp. 219–39.

@article{testa2017a,
  title = {Does democracy enhance or reduce lethal violence? Examining the role of the rule of law},
  year = {2017},
  journal = {Homicide Studies},
  pages = {219-239},
  publisher = {SAGE Publications Sage CA: Los Angeles, CA},
  volume = {21},
  author = {Testa, Alexander and Young, Joseph K and Mullins, Christopher}
}