Zimring, F. E. (2007). The great American crime decline. Oxford University Press.
Dyfyniad Arddull ChicagoZimring, Franklin E. The Great American Crime Decline. New York: Oxford University Press, 2007.
Dyfyniad MLAZimring, Franklin E. The Great American Crime Decline. Oxford University Press, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.