John، C.، و Abou Saleh، M. T. (2007). Conducting randomised controlled trials of psychological Interventions in the field of drug addiction: Trials and tribulations. المجلة العربية للطب النفسي، مج18, ع2 ، 70 - 83. مسترجع من http://search.mandumah.com/Record/698176
John، Christopher، و Mohammed T. Abou Saleh. "Conducting Randomised Controlled Trials of Psychological Interventions in the Field of Drug Addiction: Trials and Tribulations." المجلة العربية للطب النفسي مج18, ع2 (2007): 70 - 83. مسترجع من http://search.mandumah.com/Record/698176