Wolf, I., Du, Y., & Knopf, H. (2017). Changes in prevalence of psychotropic drug use and alcohol consumption among the elderly in Germany: Results of two National Health Interview and Examination Surveys 1997-99 and 2008-11. BMC Psychiatry.
Chicago-tyylinen lähdeviittausWolf, Ingrid-Katharina, Yong Du, ja Hildtraud Knopf. "Changes in Prevalence of Psychotropic Drug Use and Alcohol Consumption Among the Elderly in Germany: Results of Two National Health Interview and Examination Surveys 1997-99 and 2008-11." BMC Psychiatry 2017.
MLA-viiteWolf, Ingrid-Katharina, Yong Du, ja Hildtraud Knopf. "Changes in Prevalence of Psychotropic Drug Use and Alcohol Consumption Among the Elderly in Germany: Results of Two National Health Interview and Examination Surveys 1997-99 and 2008-11." BMC Psychiatry 2017.