APA (7th ed.) Zitazioa
Freeman, S. D. Exploring Energy Choices: A Preliminary Report. Fundación Ford.
Chicago Style (17th ed.) Zitazioa
Freeman, S. David. Exploring Energy Choices: A Preliminary Report. Washington, EUA: Fundación Ford.
MLA (9th ed.) Zitazioa
Freeman, S. David. Exploring Energy Choices: A Preliminary Report. Fundación Ford.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.