APA (7th ed.) Zitazioa
Robert A. Helliwell. (2006). Whistlers and Related Ionospheric Phenomena. Dover Publications.
Chicago Style (17th ed.) Zitazioa
Robert A. Helliwell. Whistlers and Related Ionospheric Phenomena. New York: Dover Publications, 2006.
MLA (9th ed.) Zitazioa
Robert A. Helliwell. Whistlers and Related Ionospheric Phenomena. Dover Publications, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.