UN. (1989). National Authorities Empowered To Issue Certificates And Authorizations For The Import And Export Of Narcotic Drugs And Psychotropic Substances. United Nations.
Чикаго маягийн жагсаалтUN. National Authorities Empowered To Issue Certificates And Authorizations For The Import And Export Of Narcotic Drugs And Psychotropic Substances. New York: United Nations, 1989.
MLA ишлэлUN. National Authorities Empowered To Issue Certificates And Authorizations For The Import And Export Of Narcotic Drugs And Psychotropic Substances. United Nations, 1989.
Warning: These citations may not always be 100% accurate.