Open University, Boyle, G., Everett, B., & Ramage, J. (2003). Energy systems and sustainability. Oxford University Press, in association with the Open University.
Lua i Stíl Chicago (17ú heag.)Open University, Godfrey Boyle, Bob Everett, agus Janet Ramage. Energy Systems and Sustainability. Oxford ; New York: Oxford University Press, in association with the Open University, 2003.
Lua MLA (8ú heag.)Open University, et al. Energy Systems and Sustainability. Oxford University Press, in association with the Open University, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.