Division for Policy Analysis and Public Affairs. (2019). World Drug Report 2019. United Nations Office on Drugs and Crime.
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Dyfyniad Arddull Chicago
Division for Policy Analysis and Public Affairs. World Drug Report 2019. Ginebra: United Nations Office on Drugs and Crime, 2019.
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Dyfyniad MLA
Division for Policy Analysis and Public Affairs. World Drug Report 2019. United Nations Office on Drugs and Crime, 2019.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.