Cita APA (7th ed.)

Letcher, T. M. (2020). Future energy: Improved, sustainable and clean options for our planet (Third edition.). Elsevier. https://doi.org/10.1016/C2018-0-01500-5

Cita Chicago (17th ed.)

Letcher, T. M. Future Energy: Improved, Sustainable and Clean Options for Our Planet. Third edition. Amsterdam: Elsevier, 2020. https://doi.org/10.1016/C2018-0-01500-5.

Cita MLA (9th ed.)

Letcher, T. M. Future Energy: Improved, Sustainable and Clean Options for Our Planet. Third edition. Elsevier, 2020. https://doi.org/10.1016/C2018-0-01500-5.