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.
Cita Chicago Style (17a ed.)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.
Cita MLA (8a ed.)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.