Citação norma APA
ebrary, Inc, Ludwig, J., & Cook, P. J. (2003). Evaluating gun policy: Effects on crime and violence. Brookings Institution Press.
Citação norma Chicago
ebrary, Inc, Jens Ludwig, and Philip J. Cook. Evaluating Gun Policy: Effects on Crime and Violence. Washington, D.C.: Brookings Institution Press, 2003.
Citação norma MLA
ebrary, Inc, et al. Evaluating Gun Policy: Effects on Crime and Violence. Brookings Institution Press, 2003.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.