Cita APA (7th ed.)
ebrary, Inc. (1986). The Earth's electrical environment. National Academy Press.
Cita Chicago (17th ed.)
ebrary, Inc. The Earth's Electrical Environment. Washington, D.C.: National Academy Press, 1986.
Cita MLA (9th ed.)
ebrary, Inc. The Earth's Electrical Environment. National Academy Press, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.