United Nations General Assembly 20th plenary meeting, 22 September 2005, New York United Nations General Assembly 20th plenary meeting, 3 October 1996, New York IPS : mengenal ragam budaya & bangsa-bangsa di dunia / disusun oleh, Indra P. ; editor, Iwan Kusmawan Kenjataan-kenjataan pokok P.B.B Lentera bangsa / Harumkan bangsa, baguskan akhlak gadis remaja /Perihal bangsa Batak / E.St. HarahapUnited Nations General Assembly 20th plenary meeting, 4 October 2001, New YorkUnited Nations Security Council 2194th meeting,31 January 1980, New YorkNaskah lembaran kampanye perlucutan senjata dunia : tanya jawab