(2009). Narcotic drugs: Quarterly supplement no. 1 : estimated world requirements for 2009, updated as of 31 March 2009. United Nations.
Chicago-Zitierstil (17. Ausg.)Narcotic Drugs: Quarterly Supplement No. 1 : Estimated World Requirements for 2009, Updated as of 31 March 2009. New York: United Nations, 2009.
MLA-Zitierstil (9. Ausg.)Narcotic Drugs: Quarterly Supplement No. 1 : Estimated World Requirements for 2009, Updated as of 31 March 2009. United Nations, 2009.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.