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.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited 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.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিUnited Nations. Department of Economic and Social Information and Policy Analysis Statistical Division. Energy Statistics Yearbook =: Annuaire Des Statistiques De L'énergie. United Nations, 2001.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.