Cita APA (7th ed.)
ebrary, Inc, Changnon, S. A., & Bell, G. D. (2000). El Niño, 1997-1998: The climate event of the century. Oxford University Press.
Cita Chicago (17th ed.)
ebrary, Inc, Stanley A. Changnon, i Gerald D. Bell. El Niño, 1997-1998: The Climate Event of the Century. Oxford ; New York: Oxford University Press, 2000.
Cita MLA (9th ed.)
ebrary, Inc, et al. El Niño, 1997-1998: The Climate Event of the Century. Oxford University Press, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.