United Nations, United Nations. Department of Public Information. Non-Governmental Organizations Section, & United Nations. Department of Public Information. Non-Governmental Organizations and Institutional Relations Section. (1997). Directory of non-governmental organizations associated with the Department of Public Information, 1997-1998. United Nations.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United Nations, United Nations. Department of Public Information. Non-Governmental Organizations Section, و United Nations. Department of Public Information. Non-Governmental Organizations and Institutional Relations Section. Directory of Non-governmental Organizations Associated with the Department of Public Information, 1997-1998. New York: United Nations, 1997.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United Nations, et al. Directory of Non-governmental Organizations Associated with the Department of Public Information, 1997-1998. United Nations, 1997.