Cita APA (7th ed.)
Letcher, T. M. (2014). Future energy: Improved, sustainable and clean options for our planet (Second edition.). Elsevier.
Cita Chicago (17th ed.)
Letcher, T. M. Future Energy: Improved, Sustainable and Clean Options for Our Planet. Second edition. Amsterdam: Elsevier, 2014.
Cita MLA (9th ed.)
Letcher, T. M. Future Energy: Improved, Sustainable and Clean Options for Our Planet. Second edition. Elsevier, 2014.
Atenció: Aquestes cites poden no estar 100% correctes.