United Nations. Department of Economic and Social Information and Policy Analysis Statistical Division. (2001). Energy statistics yearbook =: Annuaire des statistiques de l'énergie. United Nations.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United Nations. Department of Economic and Social Information and Policy Analysis Statistical Division. Energy Statistics Yearbook =: Annuaire Des Statistiques De L'énergie. New York: United Nations, 2001.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United Nations. Department of Economic and Social Information and Policy Analysis Statistical Division. Energy Statistics Yearbook =: Annuaire Des Statistiques De L'énergie. United Nations, 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.