European Monitoring Centre for Drugs and Drug Addiction. (2001). Guidelines for the evaluation of treatment in the field of problem drug use: A manual for researchers and professionals. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Monitoring Centre for Drugs and Drug Addiction. Guidelines for the Evaluation of Treatment in the Field of Problem Drug Use: A Manual for Researchers and Professionals. Luxembourg: Office for Official Publications of the European Communities, 2001.
Παραπομπή MLAEuropean Monitoring Centre for Drugs and Drug Addiction. Guidelines for the Evaluation of Treatment in the Field of Problem Drug Use: A Manual for Researchers and Professionals. Luxembourg: Office for Official Publications of the European Communities, 2001.