APA

United Nations. General Assembly, . (1999). Political declaration : guiding principles of drug demand reduction and measures to enhance international cooperation to counter the world drug problem : special session of the General Assembly devoted to countering the world drug problem together : 8-10 June 1998. Vienna: United Nations.

Chicago

United Nations. General Assembly, . 1999. Political declaration : guiding principles of drug demand reduction and measures to enhance international cooperation to counter the world drug problem : special session of the General Assembly devoted to countering the world drug problem together : 8-10 June 1998. Vienna: United Nations.

Harvard

United Nations. General Assembly, . (1999). Political declaration : guiding principles of drug demand reduction and measures to enhance international cooperation to counter the world drug problem : special session of the General Assembly devoted to countering the world drug problem together : 8-10 June 1998. Vienna: United Nations.

MLA

United Nations. General Assembly, . Political declaration : guiding principles of drug demand reduction and measures to enhance international cooperation to counter the world drug problem : special session of the General Assembly devoted to countering the world drug problem together : 8-10 June 1998. Vienna: United Nations. 1999.