Cita APA

Johnston, L. D., & Johnston, L. D. (1980). Review of general population surveys of drug abuse. Geneva: World Health Organization.

Citación estilo Chicago

Johnston, Lloyd D., y Lloyd D. Johnston. Review of General Population Surveys of Drug Abuse. Geneva: World Health Organization, 1980.

Cita MLA

Johnston, Lloyd D., y Lloyd D. Johnston. Review of General Population Surveys of Drug Abuse. Geneva: World Health Organization, 1980.