APA (7th ed.) Zitazioa
Quaschning, V. (2005). Understanding renewable energy systems. Earthsean.
Chicago Style (17th ed.) Zitazioa
Quaschning, Volkar. Understanding Renewable Energy Systems. London: Earthsean, 2005.
MLA (9th ed.) Zitazioa
Quaschning, Volkar. Understanding Renewable Energy Systems. Earthsean, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.