Cita APA (7th ed.)
ebrary, Inc. (1996). The Bering Sea ecosystem. National Academy Press.
Cita Chicago (17th ed.)
ebrary, Inc. The Bering Sea Ecosystem. Washington, D.C.: National Academy Press, 1996.
Cita MLA (9th ed.)
ebrary, Inc. The Bering Sea Ecosystem. National Academy Press, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.