Cita APA (7th ed.)
Robert A. Helliwell. (2006). Whistlers and Related Ionospheric Phenomena. Dover Publications.
Cita Chicago (17th ed.)
Robert A. Helliwell. Whistlers and Related Ionospheric Phenomena. New York: Dover Publications, 2006.
Cita MLA (9th ed.)
Robert A. Helliwell. Whistlers and Related Ionospheric Phenomena. Dover Publications, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.