1. AEF Committee on America’s Energy Future (2009) Real Prospects for Energy Efficiency in the United States. National Academies Press, Washington, DC
2. [AGU] American Geophysical Union (2013) “Human-induced climate change requires urgent action.” http://www.agu.org/news/press/pr_archives/2013/2013-38.shtml . Accessed 21 Jun 2013
3. Alliance to Save Energy, American Council for an Energy-Efficient Economy, Natural Resources Defense Council, Union of Concerned Scientists, and Tellus Institute (1991) America's Energy Choices: Investing in a Strong Economy and a Clean Environment. Union of Concerned Scientists, Cambridge, MA
4. American Physical Society (2008) Energy Future: Think Efficiency. American Physical Society, Washington, DC
5. Ayres RU, Warr B (2009) The Economic Growth Engine: How Energy and Work Drive Material Prosperity. Edward Elgar Publishing, Inc., Northampton, MA