The ESPAD Group. (2012). ESPAD Report 2015. Results from the European School Survey Project on Alcohol and Other Drugs. European Monitoring Centre on Drugs and Drug Addiction. https://doi.org/10.2810/86718
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Dyfyniad Arddull Chicago
The ESPAD Group. ESPAD Report 2015. Results from the European School Survey Project on Alcohol and Other Drugs. Lisboa: European Monitoring Centre on Drugs and Drug Addiction, 2012. https://doi.org/10.2810/86718.
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Dyfyniad MLA
The ESPAD Group. ESPAD Report 2015. Results from the European School Survey Project on Alcohol and Other Drugs. European Monitoring Centre on Drugs and Drug Addiction, 2012. https://doi.org/10.2810/86718.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.