Intergovernmental Panel on Climate Change. Working Group 1. (1990). Scientific assessment of climate change: The policymakers' summary of the report of Working Group I to the Intergovernmental Panel on Climate Change. World Meteorological Organization/United Nations Environment Programme.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Intergovernmental Panel on Climate Change. Working Group 1. Scientific Assessment of Climate Change: The Policymakers' Summary of the Report of Working Group I to the Intergovernmental Panel on Climate Change. [Geneva?]: World Meteorological Organization/United Nations Environment Programme, 1990.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Intergovernmental Panel on Climate Change. Working Group 1. Scientific Assessment of Climate Change: The Policymakers' Summary of the Report of Working Group I to the Intergovernmental Panel on Climate Change. World Meteorological Organization/United Nations Environment Programme, 1990.