Soren, D. (1992). Experience of The Nordic Countries in Tackling The Environmental Impacts of Energy Supply and Use. World Energy Council.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Soren, Dalager. Experience of The Nordic Countries in Tackling The Environmental Impacts of Energy Supply and Use. London: World Energy Council, 1992.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Soren, Dalager. Experience of The Nordic Countries in Tackling The Environmental Impacts of Energy Supply and Use. World Energy Council, 1992.