Dyfyniad APA
Cook, P. J., & Ludwig, J. (2000). Gun violence: The real costs. Oxford University Press.
Dyfyniad Arddull Chicago
Cook, Philip J., and Jens Ludwig. Gun Violence: The Real Costs. Oxford ; New York: Oxford University Press, 2000.
Dyfyniad MLA
Cook, Philip J., and Jens Ludwig. Gun Violence: The Real Costs. Oxford University Press, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.