Dyfyniad APA

United Nations Office on Drugs and crime. (2004). World drug report. United Nations Publication.

Dyfyniad Arddull Chicago

United Nations Office on Drugs and crime. World Drug Report. United Nations Publication, 2004.

Dyfyniad MLA

United Nations Office on Drugs and crime. World Drug Report. United Nations Publication, 2004.

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