Dyfyniad APA

United Nations. (1991). The United Nations and crime prevention. United Nations.

Dyfyniad Arddull Chicago

United Nations. The United Nations and Crime Prevention. New York: United Nations, 1991.

Dyfyniad MLA

United Nations. The United Nations and Crime Prevention. United Nations, 1991.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.