(2011). Narcotic drugs: Quarterly Supplement No.1 : estimated world requirements for 2011, updated as of 31 March 2011. United Nations.
Chicago-Zitierstil (17. Ausg.)Narcotic Drugs: Quarterly Supplement No.1 : Estimated World Requirements for 2011, Updated as of 31 March 2011. New York: United Nations, 2011.
MLA-Zitierstil (9. Ausg.)Narcotic Drugs: Quarterly Supplement No.1 : Estimated World Requirements for 2011, Updated as of 31 March 2011. United Nations, 2011.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.